Conserving natural resources :
Allen, Shirley W.
Conserving natural resources : principles and practice in a democracy Shirley W. Allen - New York : McGraw-Hill Book Company , 1955 - ix, 336 p. : ill. pictures
Index: p. 337-47.
Conservation of natural resources Mines and mineral resources Soil conservation Water conservation Wildlife conservation
333.72 / ALL/C
Conserving natural resources : principles and practice in a democracy Shirley W. Allen - New York : McGraw-Hill Book Company , 1955 - ix, 336 p. : ill. pictures
Index: p. 337-47.
Conservation of natural resources Mines and mineral resources Soil conservation Water conservation Wildlife conservation
333.72 / ALL/C
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