GORDON, J. (1979). Structures Why Things Don't Fall Down. Pitman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGORDON, J.E. Structures Why Things Don't Fall Down. Pitman, 1979.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGORDON, J.E. Structures Why Things Don't Fall Down. Pitman, 1979.
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