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Darker Than You Think, by Jack Williamson. Frontispiece by Cartier. From The Visual Encyclopedia of Science Fiction, edited by Brian Ash (Triune Books, 1978).From Oxfam in Nottingham.
The Best Of Jack Williamson (Del Rey, 1978). Cover art by Ralph McQuarrie.From Ebay.
pyramaze: Darker than you think (Jack Williamson)
scificovers: If vol 13 no 3, July 1963. Cover by Ed Emshwiller illustrating “The Reefs of Space” by Jack Williamson and Frederik Pohl.
gameraboy: Dragon’s Island by McClaverty on Flickr. Dragon’s Island (1952) by Jack Williamson. Cover art by Earle Bergey
sciencefictiongallery: Undersea City by Frederik Pohl & Jack Williamson - Unknown artist.