I stumbled upon a treasure trove of old outdoors books at Iconoclast Books in Ketchum, Idaho this weekend; this one's from 1970.
If only hiking through sun cups like these was as serene and lovely as the photo implies. Also, the introductory text instructs Yosemite visitors, "DO NOT FEED, TEASE OR MOLEST THE BEARS." Noted.
The page layout is classy, and the book is simple to navigate — each set of facing pages describes one hike. Also, the map is intended as a thumbnail overview, not as the actual guide for use during the hike. (In 1970, maps could be acquired by sending $0.50 to the USGS.)
How do you know which map to purchase from the USGS for $0.50? The relevant USGS map ID information is in the top left corner of each page! Each hike has a summary that contains all the important stuff — distance, elevation change, estimated time, and so on, ordered from most broad (and important) to most specific.