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International Symposium on Computer Aided Seismic Analysis and Discrimination (2nd : 1981 : North Dartmouth, Mass.)
QE531 .I68 1981
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International Symposium on Computer Aided Seismic Analysis and Discrimination (3rd : 1983 : Catholic University of America)
QE531 .I68 1983
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QE531 .J2 v.11,no.1 1923
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Shinsai Yobō Chōsakai (Japan)
QE531 .J21 no.4-6
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Jeffreys, Harold, 1891-1989
QE531 .J463 v.1