Martin, D. (1991). Geographic information systems and their socioeconomic applications. Routledge.
Chicago-čujuhus (17. p.)Martin, David. Geographic Information Systems and Their Socioeconomic Applications. London ; New York: Routledge, 1991.
MLA-čujuhus (9. p.)Martin, David. Geographic Information Systems and Their Socioeconomic Applications. Routledge, 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.