Vielbig, K. (1997). Mount St. Helens National Volcanic Monument: A complete guide for hiking, skiing, climbing & nature viewing. The Mountaineers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVielbig, Klindt. Mount St. Helens National Volcanic Monument: A Complete Guide for Hiking, Skiing, Climbing & Nature Viewing. Seattle, WA: The Mountaineers, 1997.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVielbig, Klindt. Mount St. Helens National Volcanic Monument: A Complete Guide for Hiking, Skiing, Climbing & Nature Viewing. The Mountaineers, 1997.
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