First stated printing on this book's copyright page.
Price information on this book from The Whole Science Fiction Data Base No. 2.
Editor: Cecile Matschat. Consulting editor: Carl Carmer.
Alex Schomburg did the endpaper illustrations for all or most of the books in the Winston Science Fiction series. This is the same illustration that is used in all of the books, and it is printed on both the front and the back endpapers.
Robert A. W. Lowndes signs his article/introduction "R. W. L.".
