The pulse of the earth / by J.H.F. Umbgrove ; with 6 partly coloured plates, 94 textfigures and 2 tables
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The pulse of the earth / by J.H.F. Umbgrove ; with 6 partly coloured plates, 94 textfigures and 2 tables
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The pulse of the earth
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The pulse of the earth / by J. ...... s, 94 textfigures and 2 tables