SF80 Second printing, issued 1974/03/18 SF95 First edition, issued 1973/06/30 SF135 First edition, issued 1974/01/30 SF259 First edition, issued 1977/09/30 SF287 First edition, issued 1978/04/30 SF311 First edition, issued 1978/09/30 I bought these based on the cover art and stored them in a bookshelf away from sunlight. As the images show, the covers are in good condition!