Allen, Shirley Walter.
Conserving natural resources : principles and practice in a democracy / Shirley Walter Allen. - 2nd ed. - New York : McGraw-Hill, c 1959. - ix, 370 p. : ill. ; 24 cm.
Includes index.
337 337
Natural resources--United States.--Conservation
634.927 / A53c
Conserving natural resources : principles and practice in a democracy / Shirley Walter Allen. - 2nd ed. - New York : McGraw-Hill, c 1959. - ix, 370 p. : ill. ; 24 cm.
Includes index.
337 337
Natural resources--United States.--Conservation
634.927 / A53c