Não informado. (1940). American Journal of Physics. American Institute of Physics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. American Journal of Physics. New York: American Institute of Physics, 1940.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. American Journal of Physics. American Institute of Physics, 1940.
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