Wonder if there was any contemporary fandom/fanzine discourse about this list (that has survived to the present day)?

https://www.isfdb.org/cgi-bin/award_category_year.cgi?1+1952

Three anthologies & an omnibus seems cheating slightly, but the lack of OIaf Stapledon, 1984, Brave New World or Frankenstein seems weird? Did US fans of the time not consider them SF?

Looking more closely, Slan, The Man Who Sold the Moon, Who Goes There? and (to a much lesser extent) The Green Hills of Earth are all collections/fixups of stories that appeared in Astounding, so perhaps voters were largely picking stuff they'd already read in the magazine?