  We study nuclear medium effects in Drell-Yan processes at small target x
using quark parton distribution functions and nucleon structure functions for a
bound nucleon calculated in a microscopic nuclear model which takes into
account the effect of Fermi motion, nuclear binding and nucleon correlations
through a relativistic spectral function. The contributions of $\pi$ and $\rho$
mesons, target mass corrections and nuclear shadowing are also included. The
results are compared with the theoretical and experimental results. The model
is able to successfully explain the low target x results of E772 and E866
Drell-Yan experiments and is applicable to the forthcoming experimental
analysis of E906 Sea Quest experiment at Fermi Lab.
