TY  - BOOK
AU  - Hays,Samuel P.
TI  - Conservation and the gospel of efficiency: the progressive conservation movement, 1890-1920 
AV  - S930 .H38 1999
U1  - 333.7/2/0973 21
PY  - 1999///
CY  - Pittsburgh, Pennsylvania
PB  - University of Pittsburgh Press
KW  - Conservation of natural resources
KW  - United States
KW  - History
KW  - Environmental policy
KW  - Electronic books
N1  - Originally published: Cambridge : Harvard University Press, 1959, in series: Harvard historical monographs, 40; Includes bibliographical references (pages 277-282) and index
UR  - https://ebookcentral.proquest.com/lib/bacm-ebooks/detail.action?docID=2038102
ER  -