Não informado. (1965). Journal of economic studies. University of Aberdeen, Department of Economics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Economic Studies. Aberdeen, Escocia: University of Aberdeen, Department of Economics, 1965.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of Economic Studies. University of Aberdeen, Department of Economics, 1965.
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