  The e+ e- --> p anti-p cross section and the proton magnetic form factor have
been measured in the center-of-mass energy range from 3.0 to 6.5 GeV using the
initial-state-radiation technique with an undetected photon. This is the first
measurement of the form factor at energies higher than 4.5 GeV. The analysis is
based on 469 fb-1 of integrated luminosity collected with the BABAR detector at
the PEP-II collider at e+e- center-of-mass energies near 10.6 GeV. The
branching fractions for the decays J/psi --> p anti-p and psi(2S) --> p anti-p
have also been measured.
