sack, k. (1964). special conceptions of socialist economy. the institute of national planning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रsack, kurt. Special Conceptions of Socialist Economy. cairo: the institute of national planning, 1964.
एमएलए (9वां संस्करण) प्रशस्ति पत्रsack, kurt. Special Conceptions of Socialist Economy. the institute of national planning, 1964.
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