TY - BOOK AU - Bowler,Rosemarie M. AU - Cone,James TI - Occupational medicine secrets SN - 9748279472 PY - 1999/// CY - Philadelphia PB - Hanley & Belfus KW - Occupational diseases KW - prevention & control KW - Occupational medicine KW - methods KW - Hazardous substances KW - advances effects ER -