Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0196
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0208
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0314
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0198
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0306
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0225
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0282
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0275
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0250
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0251
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0246
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0216
Grand Canyon NPS:
2016 Grand Canyon History Symposium Historic Kolb Studio 0194