LEADER 00000nam 2200277 a 4500
001 0045190
003 UkHlHU
007 t
008 000207 0 1959 000 eng
040 UkHlHU
050 4 HC 106 H4
100 1 Hays, Samuel P.
245 10 Conservation and the gospel of efficiency :|bthe
progressive conservation movement, 1890-1920.
260 Cambridge, Mass. :|bHarvard University Press,|c1959.
300 297p.
440 0 Harvard historical monographs ;|v40
946 6XX absent
|