Worlds of If
by Kurt Vonnegut, R. A. Lafferty, Horace B. Fyfe, Lester del Rey, Frank M. Robinson, Jr. James McKimmey, Milton Lesser, Keith Laumer, Mark Clifton, Mari Wolf, Charles L. Fontenay, Kenneth O'Hara, Charles V. De Vet, Don Thompson, Lynn Venable, Winston Marks, Arnold Castle, Tom Godwin, Sam Merwin Jr., Kris Neville, Jr. Ed M. Clinton, M. C. Pease,