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1by Gregory, Paul R.
Published 1990Book -
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6by Ruffin, Roy J., 1938-
Published 1993Edition: 5th ed.Other Authors: '; “...Gregory, Paul R....”
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7by Ruffin, Roy, 1938-
Published 1997Edition: 6th ed.Other Authors: '; “...Gregory, Paul R....”
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8Published 2003Other Authors: '; “...Gregory, Paul R....”
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