REFERENCE LIST to NEBULAR ABUNDANCES FOR PNe of DIFFERENT MASSES
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 Ref CODE    Full Reference      
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 A66         Abell,G.O. 1966, Ap.J., 144, 259
 AK84        Adam,J.,& Koppen,J. 1984, A&A, 142, 461
 AS82        Adams,S.,& Seaton,M.J. 1982, MNRAS, 200, 7 p 
 A76         Aller,L.H. 1976, PASP, 88, 574
 A78         Aller,L.H. 1978, in: Y.Terzian(ed.), IAUS 76, D.Reidel Publ.Co., Dordrecht, p.255
 A90         Aller,L.H. 1990, PASP, 102, 1097  
 AC81        Aller,L.H.,& Czyzak,S.J. 1981, Proc.Nat.Acad.Sci.,78
 AC83        Aller,L.H., Czyzak,S.J. 1983, ApJS, 51,211 
 ACCK73      Aller,L.H., Czyzak,S.J., Craine,E.,& Kaler,J.B. 1973, ApJ, 182, 509
 AK87        Aller,L.H., Keyes,C.D. 1987, ApJS, 65, 405
 AKC81       Aller,L.H., Keyes,C.D.,& Czyzak,S.J. 1981, ApJ, 250, 596
 AKC85       Aller,L.H., Keyes,C.D.,& Czyzak,S.J. 1985, ApJ, 296, 492
 AKF86       Aller,L.H., Keyes,C.D.,& Feibelman,W.A. 1986, ApJ, 311, 930
 AKF88       Aller,L.H., Keyes,C.D.,& Feibelman,W.A. 1988, PASP, 100, 192
 AKRO81      Aller,L.H., Keyes,C.D., Ross,J.E.,& O'Mara,B.J. 1981, MNRAS, 197, 647
 ARKC79      Aller,L.H., Ross,R.E., Keyes,C.D.,& Czyzak,S.J. 1979, Ap&SS, 64, 347
 B78         Barker,T. 1978, ApJ, 220, 193
 B82         Barker,T. 1982, ApJ, 253, 167 
 B83         Barker,T. 1983, ApJ, 267, 630 
 B84         Barker,T. 1984, ApJ, 284, 589
 B85         Barker,T. 1985, ApJ, 294, 193
 B89         Barker,T. 1989, ApJ, 340, 921
 BP81        Benvenuti,P.,& Perinotto,M. 1981, A&A, 95, 127
 BHS78       Bohlin,R.C., Harrington,J.P.,& Stecher,T.P. 1978, ApJ, 219, 575
 C73         Cudworth,K.M. 1973, Pub.A.S.P., 85, 401 
 CHBW87      Clegg,R.E.S., Harrington,J.P., Barlow,M.J.,& Walsh,J.R. 1987, ApJ, 314, 551
 CSPTP83     Clegg,R.E.S., Seaton,M.J., Peimbert,M.,& Torres-Peimbert,S. 1983, MNRAS, 205, 417
 D75         Danziger,I.J. 1975, A&A, 38, 475
 D84         Dufour,R.J. 1984, ApJ, 287, 341
 FM88        Faundez-Abans,M.,& Maciel,W.J. 1988, Rev.Mex.Astron.Af., 16, 105
 F80         Flower,D.R. 1980, MNRAS, 193, 511
 F82         Flower,D.R. 1982, MNRAS, 199, 15 p
 FGC84       Flower,D.R., Goharji,A.,& Cohen,M. 1984, MNRAS, 206, 293
 FP81        Flower,D.R., Penn,C.J. 1981, MNRAS, 194, 13 p
 F83         French,H.B. 1983, ApJ, 273, 214
 FCMC89      Freitas Pacheco,J.A. et al. 1989, An Acad.Bras.Ci., 61, 389 
 FMC92       Freitas Pacheco,J.A., Maciel,W.J.,& Costa,R.D.D. 1992, A&A, 261, 579
 FMC91       Freitas Pacheco,J.A., Maciel,W.J.,& Costa,R.D.D. 1991, A&A, 250, 159
 FV87a       Freitas Pacheco,J.A.,& Veliz,J.G. 1987a, MNRAS, 227, 773
 FV87b       Freitas Pacheco,J.A.,& Veliz,J.G. 1987b, Rev.Mexicana Astr.Af., 15, 89 
 GA84        Goharji,A.,& Adams,S. 1984, MNRAS, 210, 683
 GM88        Gutierrez-Moreno,A.,& Moreno,H. 1988, PASP, 100, 1497
 HF83        Harrington,J.P.,& Feibelman,W.A. 1983, ApJ, 265, 258
 HLS81       Harrington,J.P., Lutz,J.H.,& Seaton,M.J. 1981, MNRAS, 195, 218
 HLSS80      Harrington,J.P., Lutz,J.H., Seaton,M.J.,& Stickland,D.J. 1980, MNRAS, 191, 13
 HSAL82      Harrington,J.P., Seaton,M.J., Adams,S.,& Lutz,J.H. 1982, MNRAS, 199, 517
 H78         Hawley,S.S. 1978, PASP, 90, 370 
 HM77        Hawley,S.S.,& Miller,J.S. 1977, ApJ, 212, 94
 K78a        Kaler,J.B. 1978a, ApJ, 225, 527
 K78b        Kaler,J.B. 1978b, ApJ, 226, 947
 K80         Kaler,J.B. 1980,  ApJ, 239, 78
 K81         Kaler,J.B. 1981, ApJ, 249, 201
 K83b        Kaler,J.B. 1983b, ApJ, 271, 188
 K83c        Kaler,J.B. 1983c, in IAUS 103, Planetary Nebulae, ed. D. R. Flower (Dodrecht: Reidel), p.557  
 K85a        Kaler,J.B. 1985a, ApJ, 290, 531
 K88         Kaler,J.B. 1988, PASP, 100, 620
 KYHJ88      Kaler,J.B., You-Hua Chu,& Jacoby,G.H. 1988, AJ, 96, 1407
 KPK87       Kaler,J.B., Pratap,P.,& Kwitter,C.B. 1987, PASP, 99, 956
 KSFI91      Kaler,J.B., et al. 1991, PASP, 103, 67
 KF85        Kaler,J.B., and Feibelman,W.A. 1985, Ap.J., 297, 724
 Kh98        Kholtygin,A.F. 1998, A&A, 329, 691
 KB93        Kingsburgh,R.,& Barlow,M.J. 1993, in: R.Weinberger and A.Acker (eds.), IAUS 155, Kluwer Acad. Publ., Dodrecht, p.571
 KAS91       Koppen,J.,Acker,A.,& Stenholm,B. 1991, A&A, 248, 197
 KJL88       Kwitter,K.B., Jacoby,G.H., and Lydon,T.J. 1988, A.J., 96, 997
 KSK90       Kaler,J.B., Shaw,R.A.,& Kwitter,K.B. 1990, Ap.J., 359, 392 
 L81         Lutz,J.H. 1981, ApJ, 247, 144
 MH81        Marionni,P.,& Harrington,J.P. 1981, in The Universe at Ultraviolet Wavelengths, ed. R.Chapman (NASA Conf.Pub. 2171), p.633
 MFC90       Maciel,W.J., Freitas Pacheco,J.A.,& Codina,S.J. 1990, A&A, 239, 301
 PK67        Perek,L., and Kohoutek,L. 1967, Catalogue of Galactic Planetary Nebulae
 PTP83       Peimbert,M.,& Torres-Peimbert,S. 1983, D.R.Flower(ed.), IAUS 103, D.Reidel Pub.Co., Dordrecht, p.233
 PTP87       Peimbert,M.,& Torres-Peimbert,S. 1987, Rev.Mexicana Astr. Af., 14, 540
 Peq80       Pequignot,D. 1980, A&A, 83, 52
 PeqAS78     Pequignot,D., Aldrovandi,S.M.V.,& Stasinska,G. 1978, A&A, 63, 313 
 PB81a       Perinotto,M.& Benvenuti,P. 1981a, A&A, 100, 241
 PB81b       Perinotto,M.& Benvenuti,P. 1981b, A&A, 101, 88
 PPB80       Perinotto,M., Panagia,N.,& Benvenuti,P. 1980, A&A, 85, 332
 P84         Pottasch,S.R. 1984, Planetary Nebulae, D.Reidel Publ.Co., Dordrecht
 PGW82       Pottasch,S.R., Gilra,D.P.,& Wesselius,P.R. 1982, A&A, 109, 182
 PPmORBH85   Pottasch,S.R., Preite-Martinez,A., Olnon,F.M., Raimond, E., Beintema,D.A.,& Habing,H.J. 1985, A&A, 143, L11 
 PPmOJK86    Pottasch,S.R., Preite-Martinez,A., Olnon,F.M., Jing-er,M., & Kingma,S. 1986, A&A, 161, 363
 PGGW81      Pottasch,S.R., Gathier,R., Gilra,D.P.,& Wesselius, P.R. 1981, A&A, 102, 237
 PDM86       Pottasch,S.R., Dennefeld,M.,& Jing-er,M. 1986, A&A, 155, 397
 P81         Price,C.M. 1981, ApJ, 247, 540
 PMP84       Pwa,T.H., Mo,J.E.,& Pottasch,S.R. 1984, A&A, 139, L1
 SFO84       Sabbadin,F., Falomo,R.,& Ortolani,S. 1984, A&A, 137, 177
 S83         Seaton,M.J. 1983, in IAUS 103, Planetary Nebulae, ed. D.R.Flower (Dodrecht: Reidel), p.129
 ST85        Shibata,K.,& Tamura,S. 1985, PASJ, 37, 325
 S78         Shields,G.A. 1978,ApJ, 219, 565 
 ShAKC81     Shields,G.A., Aller,L.H., Keyes,C.D.,& Czyzak,S.J. 1981, ApJ, 248, 569
 TPP77       Torres-Peimbert,S.,& Peimbert,M. 1977, Rev.Mexicana Astr. Af., 2, 181
 TPP81       Torres-Peimbert,S.,& Pena,M. 1981, Rev.Mexicana Astr. Af., 6, 301
 TPPD81      Torres-Peimbert,S., Pena,M.,& Daltabuit,E. 1981,in The Universe at Ultraviolet Wavelengths, ed. R.D.Chapman (NASA Conf.Pub.2171), p.641  
 TPP90       Torres-Peimbert,S., Peimbert,M.,& Pena,M. 1990, A&A, 233,540
 TPPD80      Torres-Peimbert,S., Peimbert,m.,& Daltabuit,E. 1980, ApJ, 238, 133
 W88         Webster,B.L. 1988, MNRAS, 230, 337