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Title
Yak Tunnel [1]
Yak Tunnel and buildings, Leadville [1]
Yak Tunnel buildings and offices [1]
Yak Tunnel office buildings, Lake County [1]
Yak Tunnel showing connection to Irene shaft [1]
Yak Tunnel, Lake County, Colorado [1]
Yak Tunnel, Leadville [1]
Yakov Kasman, piano: with Dina Kasman, piano [1]
Yampa coal field, Colorado: Moffat Tunnel will make field accessible: accompanied by chart (2 sheets): "Proximate analyses of samples of coal from the Yampa coal field, Moffat & Routt Counties, Colorado; all analyses made by the United States Bureau of Mines": 1924 Dept. of the Interior release 17848, The [1]
Yan chair at Keystone [1]
Yan chair lift and terminal showing bull wheel at Keystone, Colorado [1]
Yan chair lift at Loveland Basin, Colorado [3]
Yan chair lift at Loveland, Colorado [1]
Yan chair lift at Squaw Valley, California [2]
Yan chair lift at Winter Park, Colorado [1]
Yan chair lift showing bull wheel at Squaw Valley, California [1]
Yan chair lift showing bull wheel at Winter Park, Colorado [1]
Yan chair lift terminal at Loveland Basin, Colorado [1]
Yan control panel at Winter Park [1]
Yan drive machinery at Winter Park, Colorado [1]