  Inclusive production cross sections of $\pi^\pm$, $K^\pm$ and $p\bar{p}$ per
hadronic $e^+e^-$ annihilation event in $e^+e^-$ are measured at a
center-of-mass energy of 10.54 GeV, using a relatively small sample of very
high quality data from the BaBar experiment at the PEP-II $B$-factory at the
SLAC National Accelerator Laboratory. The drift chamber and Cherenkov detector
provide clean samples of identified $\pi^\pm$, $K^\pm$ and $p\bar{p}$ over a
wide range of momenta. Since the center-of-mass energy is below the threshold
to produce a $B\bar{B}$ pair, with $B$ a bottom-quark meson, these data
represent a pure $e^+e^- \rightarrow q\bar{q}$ sample with four quark flavors,
and are used to test QCD predictions and hadronization models. Combined with
measurements at other energies, in particular at the $Z^0$ resonance, they also
provide precise constraints on the scaling properties of the hadronization
process over a wide energy range.
