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1by American Society of Agricultural Engineers, St. Joseph, Mich. eng, Natn. Drainage Symp eng 13-14 Dec 1976 3 Chicago, Ill. (USA)
Published 1977Texto bibliotecaFAO IT -
2Managing livestock wastes - Proceedings of an international symposium Managing livestock wastes - Proceedings of an international symposiumby American Society of Agricultural Engineers, St. Joseph, Mich. eng, Int. Symp. on Livestock Wastes eng 21 Apr 1975 3 Urbana-Champaign, Ill. (USA)
Published 1975Texto bibliotecaFAO IT -
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