Não informado. Annual Report of the Director of the Geophysical Laboratory. Carnegie Institution of Washington.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Annual Report of the Director of the Geophysical Laboratory. Washington: Carnegie Institution of Washington.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Annual Report of the Director of the Geophysical Laboratory. Carnegie Institution of Washington.
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