Agricultural productivity and environmental quality joint hearings before the Subcommittee on Natural Resources and Environment of the Committee on Science and Technology and the Subcommittee on Conservation and Credit of the Committee on Agriculture, U.S. House of Representatives, Ninety-sixth Congress, first session, July 25, 26, 1979
United States.Congress.House.Committee on Science and Technology.Subcommittee on Natural Resources and Environment.
United States.Congress.House.Committee on Agriculture.Subcommittee on Conservation and Credit.
Washington U.S.G.P.O.
1980
Agricultural productivity
Agricultural ecology