00647nam a2200121Ia 4500008004100000020001800041100003600059245011600095260003900211650002400250650020600274856004500480171212s9999    xx            000 0 und d  a9780874214031  aAton, James M;McPherson, Robert  cAton, James M;McPherson, RobertaRiver Flowing From The SunrisebAn Environmental History of the Lower San Juan  bUniversity Press of Coloradoc2000  aBiological Sciences  aNature -- Effect of human beings on -- San Juan River Valley (Colo.-Utah); Human ecology -- San Juan River Valley (Colo.-Utah) -- History; San Juan River Valley (Colo.-Utah) -- Environmental conditions  uwww.jstor.org/stable/10.2307/j.ctt46nz6w