Logan, R., & Manson, C. (1983). Mount St. Helens--annotated index to video archives. State of Washington, Dept. of Natural Resources, Division of Geology and Earth Resources.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLogan, Robert, और Connie Manson. Mount St. Helens--annotated Index to Video Archives. Olympia, Wash.: State of Washington, Dept. of Natural Resources, Division of Geology and Earth Resources, 1983.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLogan, Robert, और Connie Manson. Mount St. Helens--annotated Index to Video Archives. State of Washington, Dept. of Natural Resources, Division of Geology and Earth Resources, 1983.
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