Samani, O. A. (1971). A study of central villages and their served envelopes as lower order planning units for rural development in the Sudan. Khartoum: University of Khartoum. Department of Geography.
Παραπομπή Chicago StyleSamani, Osman Al. A Study of Central Villages and Their Served Envelopes As Lower Order Planning Units for Rural Development in the Sudan. Khartoum: University of Khartoum. Department of Geography, 1971.
Παραπομπή MLASamani, Osman Al. A Study of Central Villages and Their Served Envelopes As Lower Order Planning Units for Rural Development in the Sudan. Khartoum: University of Khartoum. Department of Geography, 1971.
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