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1
le Becker, Burton C.
Washington : Office of Research and Monitoring U. S. Environmental Protection Agency; for sale by the Supt. of Docs., U. S. Govt Print. Off., 1972

Leabhar
2
le Sharpe, C. F. Stewart (Charles Farquharson Stewart), 1907-
Washington, D.C. : U.S. Dept. of Agriculture, 1938

Leabhar
3
Boulder : Westview Press, 1987

Leabhar
4
Washington, D.C. (722 Jackson Place, N.W., Washington, D.C. 20006) : National Agricultural Lands Study, 1980

Government Document Leabhar
5
le Sutton, John D.
[Washington, D.C.] : U.S. Dept. of Agriculture, Economic Research Service, Natural Resource Economics Division, 1986

Government Document Leabhar
6
le Osteen, Craig D.
[Washington, D.C.] : U.S. Dept. of Agriculture, Economic Research Service, Natural Resource Economics Division, 1985

Government Document Leabhar
7
le Hyberg, Bengt, 1952-
[Washington, DC] : U.S. Dept. of Agriculture, Economic Research Service, Resources and Technology Division, 1988

Government Document Leabhar