Não informado. (1961). Gulf Research Reports. Gulf Coast Research Laboratory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Gulf Research Reports. Ocean Springs, Miss: Gulf Coast Research Laboratory, 1961.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Gulf Research Reports. Gulf Coast Research Laboratory, 1961.
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