... If the latter is comparable with galactic values at some galactic latitudes, it can impede detection by LISA of some interesting relic cosmological GW backgrounds , and specific statistical features of the relic GW should be used to separate them against the noise from astrophysical sources. \begin{wrapfigure} {l} {5.6cm} \epsfxsize=5.6cm \epsfbox{x1.eps} \caption{Caption of the figure} \end{wrapfigure} The galactic ...