TY - BK AU - MacLean,J.T. TI - Herbicides: ecological effects, January 1983 - December 1984 U1 - 86-044944 PY - 1985/// KW - Agricultural chemicals KW - Pollution KW - Protection of plants general aspects N1 - Bibliography NAL, USDA, Beltsville, Md. 20705 - USA T2 - Quick bibliography series - National Agricultural Library (U.S.) (USA). no. 85-17 Jun 1985. 10 p ER -