We present a measurement of the B^0 <-> B-bar^0 oscillation
frequency using a flavor tagging method based on correlations of B meson
flavor with the charge of other particles produced in ppbar collisions at sqrt
s = 1.8 TeV.  Such correlations are expected to arise from b quark
hadronization and from B^** decays.  We partially reconstruct B mesons using
the semileptonic decays B^0 -> l^+D^(*)-X and B^+ -> l^+D-bar^0X.  From the
oscillation frequency, we obtain the mass difference between the two B^0 mass
eigenstates, Delta m_d = 0.471^+0.078_ -0.068(stat) +\- 0.034(syst) \hbar
ps^-1, and measure the efficiency and purity of this flavor tagging method for
both charged and neutral B mesons.