Worlds of If Super Pack #3

By H. B. Fyfe, Milton Lesser, Arthur Dekker Savage, August Derleth, Unknown Author, James Blish, Jr. James McKimmey, Keith Laumer, Mari Wolf, Unknown Author, Alvin Heiner, Don Berry, Mack Reynolds, Kenneth O'Hara, Unknown Author, Unknown Author, Unknown Author, Unknown Author, Unknown Author, Unknown Author, Unknown Author, Alfred Coppel, Unknown Author, Unknown Author, Russell Burton, Unknown Author, Unknown Author, Unknown Author, Unknown Author, Andersen Horne, Unknown Author, Unknown Author