01651nam 2200481 450 991079117850332120200520144314.00-585-04391-40-8229-7203-4(CKB)2550000001330429(Au-PeEL)EBL2038102(CaPaEBR)ebr10905437(CaONFJC)MIL627572(OCoLC)891395305(MiAaPQ)EBC2038102(EXLCZ)99255000000133042919981209e19991959 uy| 0engurcnu||||||||rdacontentrdamediardacarrierConservation and the gospel of efficiency the progressive conservation movement, 1890-1920 /Samuel P. HaysPittsburgh, Pennsylvania :University of Pittsburgh Press,1999.©19591 online resource (320 pages)Originally published: Cambridge : Harvard University Press, 1959, in series: Harvard historical monographs, 40.0-8229-5702-7 1-306-96321-4 Includes bibliographical references (pages 277-282) and index.Conservation of natural resourcesUnited StatesHistoryEnvironmental policyUnited StatesHistoryConservation of natural resourcesHistory.Environmental policyHistory.333.7/2/0973Hays Samuel P.102888MiAaPQMiAaPQMiAaPQBOOK9910791178503321Conservation and the gospel of efficiency36107UNINA