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Mal,
 
Locating recent (post 1950's Army Map Service) large-scale topographic maps
of China are very difficult, and maybe impossible to find outside of China,
as I have discovered from my own recent inquiry on Beijing topos.  The best
that we have are the L-500 series at 1:250K by the AMS, compiled 1954.  If
you need bl&wh copies, and if anybody knows of a source for larger-scale
topos for China, please let me know.
Aloha,
Ross Togashi
University of Hawaii at Manoa
Hamilton Library Map Collection