sack, k. (1964). special conceptions of socialist economy. the institute of national planning.
Tohutoru Kātū Chicago (17th ed.)sack, kurt. Special Conceptions of Socialist Economy. cairo: the institute of national planning, 1964.
Tohutoro MLA (9th ed.)sack, kurt. Special Conceptions of Socialist Economy. the institute of national planning, 1964.
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