Kreps, Juanita Morris Our natural resources their development and use. - New York Wilson 1955. - 189 p. 20 cm. - The Reference shelf v. 27, no. 2 . Bibliography: p. [180]-189. LCCN: 55006801 Subjects--Topical Terms: Natural resources--United States. LC Class. No.: HC103.7 / .K7 Dewey Class. No.: 333.72