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1
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4
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5by Forbes, R. J. (Robert James), 1900-Subjects “...Technology and civilization....”
Published 1971
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6by Walker, Charles R. (Charles Rumford), 1893-Subjects “...Technology and civilization....”
Published 1968
Book -
7by Walker, Charles R. (Charles Rumford), 1893-Subjects “...Technology and civilization....”
Published 1962
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9Published 1972Subjects “...Technology and civilization Congresses....”
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12Published 1973SubjectsBook
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16by Nef, John U. (John Ulric), 1899-Subjects “...Technology and civilization....”
Published 1958
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20