TY - BOOK ED - Risk Egineering Laboratory (U.S) ED - Centre for Environmental Research and Development (U.S) TI - Guides to pollution prevention : U1 - 628.5 22 PY - 1991/// CY - Cincinnati, Oh. : PB - Centre for Environmental Research and Developme nt, KW - Photographic industry KW - Environmental aspects N1 - October 1991; EPA/625/7-91/012 ER -