Cromely, Robert G.. Digital Cartography / Textual Documents Robert G.Cromely. - 1st ed. / - London : Prentice-Hall, Inc. , 1992. - 317p. : ill ; 22cm . ISBN: 0-13-710930-X Subjects--Index Terms: Geography-Digital cartography Cartography-Digital PG-Geography Dewey Class. No.: 912 / Cr 88 Di