Conserving American resources /
Parson, Ruben L
Conserving American resources / by Ruben L. Parson, and associates J. Lee Guernsey ... [et al.] - 3rd ed. - Englewood Cliffs, N.J. : Prentice-Hall, 1972 - x, 608 p. : ill. ; 24 cm.
Includes bibliographical references
0131677675
75-173428
Conservation of natural resources--United States
Conserving American resources / by Ruben L. Parson, and associates J. Lee Guernsey ... [et al.] - 3rd ed. - Englewood Cliffs, N.J. : Prentice-Hall, 1972 - x, 608 p. : ill. ; 24 cm.
Includes bibliographical references
0131677675
75-173428
Conservation of natural resources--United States