Development, O. f. E. C. a. (1974). The Research system. The author.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDevelopment, Organisation for Economic Co-operation and. The Research System. The author, 1974.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDevelopment, Organisation for Economic Co-operation and. The Research System. The author, 1974.
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