For which magazine did the author of the novel "Burn Witch Burn!" serve as an editor?
A. Merritt Abraham Grace Merritt (January 20, 1884 – August 21, 1943) – known by his byline, A. Merritt – was an American Sunday magazine editor and a writer of fantastic fiction.
Authentic Science Fiction Authentic Science Fiction was a British science fiction magazine published in the 1950s that ran for 85 issues under three editors: Gordon Landsborough, H.J. Campbell, and E.C. Tubb. The magazine was published by Hamilton and Co., and began in 1951 as a series of novels appearing every two weeks; by the summer it became a monthly magazine, with readers' letters and an editorial page, though fiction content was still restricted to a single novel. In 1952 short fiction began to appear alongside the novels, and within two more years it completed the transformation into a science fiction magazine.