Unwin, D. Computer programming for geographers / David J. Unwin and John A. Dawson. - London ; New York : Longman, 1985. - xii, 252 p. ; Includes index. Bibliography: p. [240]-246. ISBN: 0582300959 : Subjects--Topical Terms: Geography Dewey Class. No.: 001.64 24 UNW/C