... Data . ... Schmidt Star Formation Law in M33 . ... Combining our new (HST-GO 11080; 84 galaxies) and archival HST/NICMOS Pa? (1.8756?m) images of the centers of 107 nearby galaxies with their high resolution (~2"-5") interferometric millimetric CO data from BIMA/CARMA, OVRO, NRO and PdBI, we study the form of the virtually extinction-free SFR vs. gas density law in a density and dust extinction regime at least 30 times higher than normally accessible with optical SFR tracers like H?. ...