  We discuss the nuclear dependence of $\psi$ and $\psi'$ production in
hadron-nucleus interactions as a function of longitudinal momentum fraction
$x_F$. Nuclear effects such as final-state absorption, interactions with
comovers, shadowing of parton distributions, energy loss, and intrinsic
heavy-quark components are described separately and incorporated into the model
which is then compared to the preliminary E866 data. The resulting nuclear
dependence of Drell-Yan production at 800 GeV and proposed measurements of
$\psi$, $\psi'$ and Drell-Yan production at 120 GeV are also calculated.
