Judy--
 
        Try surveyor's supply houses.  We have catalogs for Lengemann of
Florida (1-800-342-9238) and Allen Precision Equipment of Atlanta
(1-800-241-6223), which both list various types of graph paper.  If you are
looking for metric, however, it may be tougher to find.  We get some from UF
bookstore here.  Forestry Suppliers, as already mentioned, is also a
possible source.
 
                                               Also from the pencil and
paper school,
 
                                                Lucy Wayne