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Spivey Gary H. M.D. M.P.H.; Brown, Perry C. M.S.P.H.; Baloh, Robert W. M.D.; Campion, David S. M.D.; Valentine, Jane L. Ph.D.; Massey, Frank J. Jr. Ph.D.; Browdy, Ben L. Ph.D.; Culver, Dwight B. M.D.
Journal of Occupational Medicine: June 1979 - Volume 21 - Issue 6 - ppg 423-429
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