Hawkeye, Scarlet Witch and Quicksilver faces are taken from different sources. Hawkeye's face is from Tales of Suspense # 57, page 5; Quicksilver and the Scarlet Witch are lifted from Strange Tales # 128, page 3. Sol Brodsky may have touched up or redrawn the faces, particularly those of Wanda and Pietro. Info per Nick Caputo, February 2016.
Kuramoto credit per Nick Caputo, April 2013. Previous indexer credited Ray Holloway. Nick notes that based upon an examination of the lettering styles Ray Holloway has been incorrectly identified as using the pseudonym "Sherigail". The name was derived from Morrie Kuramoto's wife and daughter, Gail and Sherry, as noted here:
Letters from Mike Arden, Gary Walker, Ralph Brown, Jr., Mickey Paolucci, Roy Coakley, Jimmy Morton, Charles Hutler, Scotty Gibbs, Vincent Stuart II, and David MacKidd.