Geological Survey (U.S.). (1986). Earthquakes & volcanoes. U.S. Geological Survey ; For sale by the Supt. of Docs., U.S. G.P.O..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGeological Survey (U.S.). Earthquakes & Volcanoes. Reston, Va. : Washington, D.C.: U.S. Geological Survey ; For sale by the Supt. of Docs., U.S. G.P.O., 1986.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGeological Survey (U.S.). Earthquakes & Volcanoes. U.S. Geological Survey ; For sale by the Supt. of Docs., U.S. G.P.O., 1986.
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