National Research Council (U.S.). Committee on the Role of Alternative Farming Methods in Modern Production Agriculture. (1989). Alternative agriculture. National Academy Press.

National Research Council (U.S.). Committee on the Role of Alternative Farming Methods in Modern Production Agriculture. Alternative Agriculture. Washington, D.C.: National Academy Press, 1989.

National Research Council (U.S.). Committee on the Role of Alternative Farming Methods in Modern Production Agriculture. Alternative Agriculture. National Academy Press, 1989.