The SFWA Grand Masters, Volume 1: Robert A. Heinlein, Jack Williamson, Clifford D. Simak, L. Sprague de Camp, and Fritz Leiber

The SFWA Grand Masters 1 - Frederik Pohl, Fritz Leiber, Robert A. Heinlein, Jack Williamson See my blog post on it: http://gypsylibrarian.blogspot.com/2005/11/booknote-sfwa-masters-vol1.html