Notes: ©1960 No other statement of publication or printing Date from the Calendar in Delap's F&SF Review (August 1976) There are two printings with the same catalog#/price/cover; '76 and '77 Externally they are identical, though this printing is almost 1/4-inch taller than the other. Internally there are differences: ['77] on the title page under ace books has A Division of Charter Communications Inc over A GROSSET & DUNLAP COMPANY; ['76] has A Division of Grosset & Dunlap, Inc. The ads in the back, though of the same time-frame, are also different: ['77] 7I, 33I, 71A, 6H, 64B, 45C, 70A and an unnumbered ad for two Fuzzy books by H. Beam Piper; ['76] 14L, 33I, 34C, 35K, 36F, 44F, 45B, 70A, 71A Grosset bought Charter in '77, so the printing with Charter in the publisher name is the later of the two The artist is not credited, no visible signature