The first edition of Geology has the letters ABCDE on page 160. Copyright © 1972 by Western Publishing Company, Inc. Published by Golden Press, New York, N.Y. Cover price is $1.95. The number on the spine is 24349. Listed as a Golden Science Guide.
A cover (text) change to Geology is shown next. The date is 1972 with a $1.95 cover price. The number on the spine is 24349. ISBN on the back cover is 0-307-24349-4. My copy has the letters CDE on page 160. Now listed as a Golden Guide on the cover. But still listed as a Golden Science Guide on the inside front cover.
A revised edition of Geology is shown next. The date is 1991 with a $5.95 (back) cover price. Copyright © 1991, 1972 Golden Books Publishing Company, Inc. The number on the back cover is 24349-05. And the ISBN on the back cover is 0-307-24349-4. My copy has the letters KLM on page 160. An A revised edition probably exists. This book was produced about the time St. Martin's Press was buying out this line of books from Golden Press. On the back cover it states: Distributed by St. Martin's Press.
The Spanish version of Geology is titled Geologia. Number 131 in the series. © Western Publishing International, Inc., Ginebra, 1972, y por licencia para la lengua española, por Ediciones Daimon, Manuel Tamayo, 1975. Barcelona Spain.
The French version of Geology is titled Géologie. Number 155 in the series. © Western Publishing Company, Inc. Publié par les Editions des Deux Coqs d'Or, Paris, 1976.
Two versions of this title exist in a large (5 ¼ by 7 ¾ inch) hardcover. Image #1 has the number 28104 on the spine. The logo moved on the hardcover from the right to the left, and states A Golden Guide instead of A Golden Science Guide. ISBN number on the back cover of image #2 is 0-307-63549-X.
Still in print by St. Martin's Press.