sack, K., & linsel, h. (1966). planning of technical progress in industry: Planning of temporal progress of research and development. the institute of national planning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रsack, Kurt, और hermann linsel. Planning of Technical Progress in Industry: Planning of Temporal Progress of Research and Development. cairo: the institute of national planning, 1966.
एमएलए (9वां संस्करण) प्रशस्ति पत्रsack, Kurt, और hermann linsel. Planning of Technical Progress in Industry: Planning of Temporal Progress of Research and Development. the institute of national planning, 1966.
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