Gustafson, A. F. 1880-1942.
Conservation in the United States [by] A. F. Gustafson [and others] - 3d ed. - Ithaca, N. Y. : Comstock Pub. Co., 1949. - ix, 534 p. illus., maps. 24 cm.
Agr49000401
Natural resources--United States.
Conservation of natural resources--United States.
Soil conservation--United States.
United States--Economic conditions.
HC106.3 / .G885 1949
333.9 / GUC
Conservation in the United States [by] A. F. Gustafson [and others] - 3d ed. - Ithaca, N. Y. : Comstock Pub. Co., 1949. - ix, 534 p. illus., maps. 24 cm.
Agr49000401
Natural resources--United States.
Conservation of natural resources--United States.
Soil conservation--United States.
United States--Economic conditions.
HC106.3 / .G885 1949
333.9 / GUC