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- Geological Survey (U.S.), 2000, The severity of an earthquake: General Interest Publication , 15 p. : ill., map ; 23 x 11 cm.,
- Geological Survey (U.S.), 2000, USGS GeoData: General Interest Publication , 12 p. : col. maps ; c 28 cm.,
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- Newman, William L., 2000, Geologic time: Government Printing Office General Information Product , 22 p.,
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