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Time-dependent B0-anti-B0 flavor oscillations are studied in e+e-annihilation data collected with the BABAR detector at center-of-mass energiesnear the Upsilon(4S) resonance. We report a preliminary result for thetime-dependent B0-anti-B0 oscillation frequency, Delta_md = 0.512 +/- 0.017 +/-0.022 hbar ps^{-1}.Comment: 4 pages, 2 postscript figues, submitted to DPF200

A STUDY OF $B^0\bar B^0$ OSCILLATIONS WITH FULLY RECONSTRUCTED B MESONS WITH THE BABAR DETECTOR