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   61011
   The nature of unidentified Galactic gamma-ray sources remains a central
   puzzle in high energy astrophysics. We propose here exposures of three
   EGRET error boxes to complete the X-ray survey of flux-limited sample
   of galactic GeV sources in the southern sky. These GeV source have
   error boxes small enough for ASCA, and have hard spectra similar to
   known gamma-ray pulsars. ASCA's spectral sensitivity and modest spatial
   resolution provides the key observations to select any pulsar source
   responsible for the GeV emission with detection of pulsar powered
   nebula. Correlative studies in the radio allow us to exclude AGN and
   other proposed models. These data will greatly advance the
   identification of the galactic plane sources as a class. TeV and radio
   follow-ups are planed for counterparts.
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