Long, M. F. (1965). Graduate study in economics: A guide to graduate programs in economics and agricultural economics at United States and Canadian universities. American Economic Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLong, Millard F. Graduate Study in Economics: A Guide to Graduate Programs in Economics and Agricultural Economics at United States and Canadian Universities. [Evanston, Ill.]: American Economic Association, 1965.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLong, Millard F. Graduate Study in Economics: A Guide to Graduate Programs in Economics and Agricultural Economics at United States and Canadian Universities. American Economic Association, 1965.
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