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6by Forbes, R. J. (Robert James), 1900-Subjects “...Technology and civilization....”
Published 1971
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7by Walker, Charles R. (Charles Rumford), 1893-Subjects “...Technology and civilization....”
Published 1968
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8by Walker, Charles R. (Charles Rumford), 1893-Subjects “...Technology and civilization....”
Published 1962
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10Published 1972Subjects “...Technology and civilization Congresses....”
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15Published 1973SubjectsBook
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