Unwin, D. J., & Dawson, J. A. (1985). Computer programming for geographers. Longman.
Chicago Style aipamenaUnwin, David John, and John A. Dawson. Computer Programming for Geographers. London: Longman, 1985.
MLA aipamenaUnwin, David John, and John A. Dawson. Computer Programming for Geographers. Longman, 1985.
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