Tilling, R. I. (1980). Eruptions of Mount St. Helens: Past, Present, and Future. US Geological Survey.
Chicago Style (17th ed.) CitationTilling, Robert I. Eruptions of Mount St. Helens: Past, Present, and Future. US Geological Survey, 1980.
MLA (8th ed.) CitationTilling, Robert I. Eruptions of Mount St. Helens: Past, Present, and Future. US Geological Survey, 1980.
Warning: These citations may not always be 100% accurate.