Edwards, C A.
Sustainable agricultural systems/ - Ankeny, Iowa : Soil and Water Conservation Society, 1990 - xvi, 696 pages : illustrations, maps ; 24 cm
9780935734218
" Agricultural systems."
Sustainable agriculture.
Sustainable agricultural systems/ - Ankeny, Iowa : Soil and Water Conservation Society, 1990 - xvi, 696 pages : illustrations, maps ; 24 cm
9780935734218
" Agricultural systems."
Sustainable agriculture.