We’ve previously seen this cover on a 1929 edition of the Burlington Escorted Tours booklet. While this one is 48 pages and includes half-tone photos, the 1929 version was expanded to 68 pages and some of the photos were colorized.
The 1929 booklet offered twenty different tours, including two to Alaska and several to California. This one has just five of those tours: Glacier-Yellowstone, Colorado-Yellowstone, Yellowstone-Glacier, Yellowstone-Colorado, and Colorado-Salt Lake. Note that two of them are near duplicates in reverse order from two others. The program must have been successful for it to expand so rapidly between 1926 and 1929.