Não informado. (1956). Preprints. American Chemical Society, Division of Petroleum Chemistry.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Preprints. Washington: American Chemical Society, Division of Petroleum Chemistry, 1956.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Preprints. American Chemical Society, Division of Petroleum Chemistry, 1956.
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