  We consider neutrino masses generated at tree level and at one loop, through
fermion--sfermion loop diagrams, in the MSSM with R-parity violation. Using the
$(3\times 3)$ mass and mixing matrices for three generations of neutrinos and
the present experimental results on neutrinos from laboratories and
astrophysics simultaneously, we put bounds on both trilinear ($\lambda_{ijk},
\lambda'_{ijk}$) and bilinear ($\mu_{e},\mu_\mu,\mu_\tau$) R-parity-violating
couplings.
