Martin, D. (1991). Geographic information systems and their socioeconomic applications. Routledge.
Chicago-viite (17. p.)Martin, David. Geographic Information Systems and Their Socioeconomic Applications. London ; New York: Routledge, 1991.
MLA-viite (9. p.)Martin, David. Geographic Information Systems and Their Socioeconomic Applications. Routledge, 1991.
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