00905nam0-2200301---450-99000868523040332120090304145507.0000868523FED01000868523(Aleph)000868523FED0100086852320080707d1910----km-y0itay50------baengUSy-------001yy<<A >>new erosion cycle in the Grand Canyon district, ArizonaH. RobinsonChicagoUniversity1910p. 742-76324 cmEstr. da: Journal of geology, v. XVIII, n. 8Stati UnitiGran CanyonRobinson,Harry129665ITUNINARICAUNIMARCBK990008685230403321Misc.022-026Ist. s.i.ILFGEILFGENew erosion cycle in the Grand Canyon district, Arizona717256UNINA