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Cram dating code
Johnnie Sutherland <[log in to unmask]>
Mon, 27 Nov 2000 16:01:04 -0500
TEXT/PLAIN (11 lines) 
Does anybody out there have a key for deciphering the date
code scheme for the George F. Cram Co. maps? I have a map
of Greater Baltimore with N132 CR654. I have a 1950 possible
date but would like to confirm and have a key for future use.
Thanks.

Rich Boardman
Map Collection
FRee Library of Philadelphia
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