TY - BOOK AU - Zimmer, Gary F. TI - The biological farmer: a complete guide to the sustainable & pro fitable biological system of farming SN - 0911311629 U1 - 631.5/84 21 PY - 2000/// CY - Austin, Tex. PB - Acres U.S.A. KW - Organic farming KW - Alternative agriculture KW - Sustainable agriculture N1 - Includes index ER -