Natural resource conservation : an ecological approach /
Owen, Oliver S., 1920-
Natural resource conservation : an ecological approach / Oliver S. Owen. - New York : Macmillan, c1971. - xii, 593 p. : ill., maps.
Ecology--United States.
Conservation of natural resources--United States.
Natural resource conservation : an ecological approach / Oliver S. Owen. - New York : Macmillan, c1971. - xii, 593 p. : ill., maps.
Ecology--United States.
Conservation of natural resources--United States.