00449nam a2200169Ia 4500008004100000020001800041245004400059245006000103260001500163260001600178260000900194300001400203300002500217300001000242500000800252999001900260170705s9999    xx            000 0 und d  a9780545569910 4aThe camping trip that changed America :  bTheodore Roosenvelt, John Muir, and our National Parks.  aNew York :  bScholastic,  c2012  aunpaged :  bcolor illustration ;  c28cm.  a740  c336275d336275