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3Published 1971Other Authors: '; “...Hoffman, George W. (George Walter), 1914-...”
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4Published 1961Edition: 2nd ed.Other Authors: '; “...Hoffman, George W. (George Walter), 1914-...”
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5Published 1981Other Authors: '; “...Hoffman, George W. (George Walter), 1914-...”
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6Published 1983Edition: 5th ed. /Other Authors: '; “...Hoffman, George W. (George Walter), 1914-...”
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