We have measured the cross section as a function of invariant mass for
isolated electron pairs produced in p anti-p collisions at s**(1/2) = 1.8 TeV
for pair masses M > 30 GeV/(c**2).  We find good agreement between the
measured distribution and the Standard Model prediction for the Drell-Yau
production mechanism.  Additional heavy neutral vector bosons (Z') are
excluded for M(Z') < 387 GeV/c**2) (95% confidence level) assuming Standard
Model couplings.  A lower limit of 2.2 TeV (95% confidence level) is placed
on the electron-quark compositeness scale parameter Lambda(L anti-L)
associated with an effective contact interaction.