  The energy spectra of the b and bbar quarks in e+e- -> t tbar with t -> b W
(tbar -> bbar W) are calculated assuming CP violation in the production
process. Expressions for the corresponding CP violating asymmetries and optimal
observables that determine the imaginary parts of the electric and weak dipole
moment form factors of the top are derived. It is shown that polarization of
the initial lepton beams is essential to disentangle Im d^{\gamma}(s) and Im
d^{Z}(s). Numerical results are given in the Minimal Supersymmetric Standard
Model with complex phases.
