The lesser known older brother of the World of Greyhawk box set is the Folio edition (1980-1). This nice 3rd print came through the shop and demanded a photoshoot.
World of Greyhawk, folio edition
1980-1981 … Gary Gygax & Allen Hammack (editor); David C. Sutherland, Erol Otus, David S. LaForce (art); Darlene Pekul (maps) … TSR 9025 … ISBN 0935696237
See Also: Free City of Greyhawk: Hand-drawn map