The first edition of Yosemite has no letter code. © Copyright 1970 by Western Publishing Company, Inc. Published by Golden Press, New York, N.Y. Cover price is $1.50. The number on the spine is 24028. At the time this book was published Lawrence C. Hadley was the Superintendant of Yosemite National park.Listed as a Golden Regional Guide.
A minor (text) cover change to Yosemite is shown next. © Copyright 1970 by Western Publishing Company, Inc. Cover price is $1.95. ISBN 0-307-24028-3 on the back cover. Letter code BCDEF on page 160.
No revised edition exists that I am aware of. Out of print. And one of the scarcer titles in the series.