topic

• Canyons7
• Tourism7
• Environmental aspects1
• Petroleum chemical industry1
• Petroleum industry1

name

• Richardson, T. G. (Thomas G.)7
• Chase, W. M. (William M.), approximately 1818-19011
• Johnson, T. H. (Thomas H.), 1821-1

collection

• Robert N. Dennis collection of stereoscopic views9

place

• New York (State)8
• Au Sable (N.Y.)7
• Au Sable River (N.Y.)7
• Maryland1
• Pennsylvania1

genre

• Photographs9

division

• Wallach Division: Photography Collection9

type