Geography, D. o. (2019). Principles of Geographic Information Sytem. Obafemi Awolowo University.
Chicago-čujuhus (17. p.)Geography, Department of. Principles of Geographic Information Sytem. Obafemi Awolowo University, 2019.
MLA-čujuhus (9. p.)Geography, Department of. Principles of Geographic Information Sytem. Obafemi Awolowo University, 2019.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.