00813cam a2200253 a 4500 936189 BD-DhUL 20160525103927.0 980709s1978 njua b 001 0 eng 78007347 0470264276 0916672166 Halsted Press 936189 LC eng LC ABN-SNR BD-DhUL S605.5 .O37 1978 338.16 OEO Oelhaf, Robert C., 1938- Organic agriculture : economic and ecological comparisons with conventional methods / by Robert C. Oelhaf. New York : Distribution, Halsted Press, 1978. xii, 271 p. : ill. ; 24 cm. Includes index and bibliographical references Organic farming. Agriculture. ddc BK 69626 69626 0 0 ddc 0 338_160000000000000_OEO 0 NFIC 118219 DUL DUL GEN 2016-05-25 purchased 338.16 OEO 305423 2016-05-25 2 2016-05-25 BK 0 0 ddc 0 338_160000000000000_OEO 0 NFIC 118220 DUL DUL GEN 2016-05-25 purchased 338.16 OEO 305422 2016-05-25 1 2016-05-25 BK