hammam, e. e. d. (1963). economics of agricultural production and resource use. the institute of national planning.
Tohutoru Kātū Chicago (17th ed.)hammam, ezz el din. Economics of Agricultural Production and Resource Use. cairo: the institute of national planning, 1963.
Tohutoro MLA (9th ed.)hammam, ezz el din. Economics of Agricultural Production and Resource Use. the institute of national planning, 1963.
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