de Lauwe, Chombart, author
Problems of agricultural co-operation : case study in Greece : report
Organization for economic co-operation and development , 1960
 Buku Teks
Agricultural development in Indonesia: current problems,issues and polices
 Artikel Jurnal
Boken, Vijendra K., author
Monitoring and predicting agricultural drought: a global study
Oxford University Press, 2005
 Buku Teks
The study of society : methods and problems
edited by F.C. Bartlett
Kegan Paul, Trench, 1946
 Buku Teks
Yudelman, Montague, author
Africans on the land : economic problems of african agricultural development in Southeren,Central, and East Afric, Whit special reference to Southern Rhodesia
Harvard University Press , 1975
 Buku Teks
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