Conservation and the gospel of efficiency : the progressive conservation movement, 1890-1920 /
Hays, Samuel P
Conservation and the gospel of efficiency : the progressive conservation movement, 1890-1920 / Samuel P. Hays - Cambridge, Mass. : Harvard University Press, 1959 - 297 p. ; 21 cm. - Harvard historical monographs 40 .
'Bibliographical note': p. 277-282. Bibliographical footnotes
Conservation of natural resources--United States--History
Environmental policy--United States--History
Conservation and the gospel of efficiency : the progressive conservation movement, 1890-1920 / Samuel P. Hays - Cambridge, Mass. : Harvard University Press, 1959 - 297 p. ; 21 cm. - Harvard historical monographs 40 .
'Bibliographical note': p. 277-282. Bibliographical footnotes
Conservation of natural resources--United States--History
Environmental policy--United States--History