DeMers, Michael N. Fundamentals of geographic information systems / Geographic information systems Michael N. DeMers. - New York : J. Wiley & Sons, c1997. - xvii, 486 p. : ill. ; 27 cm. Includes bibliographical references and index. ISBN: 0471142840 9780471142843 Subjects--Topical Terms: Geographic information systems. Dewey Class. No.: 910.285 DEM