This 1968 booklet titled "Nuclear Clocks" published by the US Atomic Energy Commission is a valuable addition to any collection of antique books and magazines. The softcover wraps are intact and the book is in its original form with no facsimile. It provides an interesting read on Earth Science and its related topics. The book is written in English and includes illustrations making it easier to understand the subject matter. It is a unique piece of Science & Medicine literature for collectors and enthusiasts alike. The booklet was printed in the United States and belongs to the Antiquarian & Collectible category.