Não informado. The Mountain Geologist. Rocky Mountain Association of Geologists.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. The Mountain Geologist. Denver, Colo: Rocky Mountain Association of Geologists.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. The Mountain Geologist. Rocky Mountain Association of Geologists.
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