Science Fiction Old School: Pulp Magazines Mystery Cache
wb96bobwhite: Thanks to all you sci-fi fans who found this series. These were some of my favorite hides but the time has come for them to head to a galaxy far, far away...
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Science Fiction Old School: Pulp Magazines
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Science Fiction is an imaginative literary genre which poses the effects of extrapolated scientific principles or discoveries on the behavior of individuals or society. Old School refers to a time before the internet, CGI movies, and cable television, when most good science fiction (with a few TV and film exceptions) was published in books or magazines. This series highlights some great classic old school science fiction stories.
The cache is not at the posted coordinates.
OK, so there was a lot of cheap, filler material in the old magazines. But many excellent science fiction tales started as short stories or serialized chapters in pulp magazines. In fact, most of the old masters got their published start in a science fiction magazine. And a few of those magazines are still publishing today in one form or another. This cache honors those old magazines and the great stories published in them. Study the pulp magazines below to determine the cache coordinates.
Galaxy Science Fiction, November 1972
Amazing Stories, February 1937
Astounding Stories, March 1938
Planet Stories, March 1952
The Magazine of Fantasy and Science Fiction, July 1999
Fantastic Adventures, January 1947
If, December 1957
Famous Fantastic Mysteries, October 1946
Super Science Stories, February 1942

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Please, no spoilers. BYOP. And don't forget to record the Bonus clue from this cache. You'll need it for Science Fiction Old School: Bonus [GC51D8J]
Congratulations to johnwip and QuadWrays for FTF!
Additional Hints
(Decrypt)
Chmmyr: Vs lbh pna'g urne gur pnpur pnyyvat lbh, ghea hc gur Ibyhzr.
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