lot of 33 vintage commercial slides, photos of National Parks

Lot of about 33 1950s vintage professionally shot and mounted vintage slides with photos of the National Parks and more! There are: 7 slides marked Atkins Travel Slides that show the Grand Canyon; 7 slides for Death Valley National Park; 8 slides of Mt Ranier National Park; 8 slides for the -Canadian Northwest- and 3 slides stamped for the Petrified Forest Museum Association (with a great photo of a petrified tree.