Works of "Research Collection"
Place Collected: S of Keystone, Black Hills
Place Collected: S of Keystone, Black Hills
Place Collected: S of Keystone, Black Hills
Place Collected: S of Keystone, Black Hills
Place Collected: S of Keystone, Black Hills
Place Collected: S of Keystone, Black Hills
Place Collected: S of Keystone, Black Hills
Place Collected: S of Keystone, Black Hills
Place Collected: S of Keystone, Black Hills
Place Collected: S of Keystone, Black Hills