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One of the graduates of the University of Washington Department
of Geography, where a lot of this type of mapping was done, is
Dr. Gerald L. Greenberg, c/o U.S.G.S., 345 Middlefield Rd.,
MS-532, Menlo Park, CA 94025.  phone 415-329-4362.
 
Stan Stevens  UC Santa Cruz  [log in to unmask]