Organic agriculture : economic and ecological comparison with conventional methods
Oelhaf, Robert C.
Organic agriculture : economic and ecological comparison with conventional methods Robert C. Oelhaf - Montclair Allanheld, Osmun 1978 - xii, 239 p.; 23cm.
9780470264270
338.16 OC6Q
Organic agriculture : economic and ecological comparison with conventional methods Robert C. Oelhaf - Montclair Allanheld, Osmun 1978 - xii, 239 p.; 23cm.
9780470264270
338.16 OC6Q