  Using redshift samples, we calculate the cross-correlation functions of LSB
galaxies with normal galaxies in complete samples (i.e. CfA and IRAS), which
enables us to compare directly the amplitudes and shapes of the correlation
functions. For pair separations $r\gs 2\mpc$, we find that the shape is in
agreement with that of the correlation functions for other galaxies. The
amplitudes ($A$) of $\xiab (r)$ are lower than those of the autocorrelation
functions for the CfA and IRAS samples, with $A_{\rm LSB-CfA}:A_{\rm
CfA-CfA}\approx 0.4$ and $A_{\rm LSB-IRAS}:A_{\rm IRAS-IRAS}\approx 0.6$. These
results suggest that LSB galaxies are imbedded in the same large scale
structure as other galaxies, but are less strongly clustered. This offers the
hope that LSB galaxies may be unbiased tracers of the mass density on large
scales. For $r\ls 2\mpc$, the cross-correlation functions are significantly
lower than that expected from the extrapolation of $\xiab$ on larger scales,
showing that the formation and survival of LSB galaxies may be inhibited by
interaction with neighboring galaxies.
  The model which matches these observations suggests that strong luminosity
segregation in galaxy clustering is not a necessary consequence of biased
galaxy formation, unless the effect of surface brightness is taken in to
account. It is also implies a significant mass density in LSB galaxies.
