William P. McGivern
3 appearances across 3 restored issues — every one readable in full, free.
Amazing Stories, April 1941 — 1941 “Killer's Turnabout” · p.120 Read the full issue (148 pages) → 
Amazing Stories, September 1951 — 1951 “SOME WOLVES CAN'T KILL!” · p.108 Read the full issue (166 pages) → 
Amazing Stories, October 1952 — 1952 “HE PLAYED WITH DOLLS” · p.84 Read the full issue (164 pages) → Appearances are extracted from each issue's own printed contents page; entries we can't read confidently are withheld rather than guessed.