Allen, Shirley W.
Conserving natural resources / Shirley W. Allen - New York : McGraw-Hill , 1955 - ix, 374p. ; 25 cm.
Includes bibliographical references and index.
Natural resources
333.9 / ALL
Conserving natural resources / Shirley W. Allen - New York : McGraw-Hill , 1955 - ix, 374p. ; 25 cm.
Includes bibliographical references and index.
Natural resources
333.9 / ALL