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Studies in the cost of production of crops in the Punjab
Kartar Singh, (1934)
Agricultural production in Jinotega, Nicaragua : physio-biological and socio-economic conditions ; preliminary study
Tienhoven, N. van, (1981)
Farm production costs in the Njoro Area, 1958-61
(1964)
An analysis of agricultural production in Nicaragua : final report for AID contract ; AID/CM/la-C-73-21
Warnken, Philip F., (1974)
Agricultural policies of Guatemala : implications for women in agriculture
Warnken, Philip F., (1989)
Agricultural policies of Yemen : implications for women in agriculture