Não informado. (1933). Bibliography and Index of Geology Exclusive of North America. Geological Society of America.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Bibliography and Index of Geology Exclusive of North America. Washington: Geological Society of America, 1933.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Bibliography and Index of Geology Exclusive of North America. Geological Society of America, 1933.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.