If [Vol. 14 No. 6, Issue 84, November 1964] ed. Frederik Pohl (Galaxy Publishing Corporation, 40¢, 132pp, digest, cover: The Hounds of Hell by Emsh)
Described as an “All EMSH Issue” on the cover.
If [Vol. 15 No. 6, Issue 91, June 1965] ed. Frederik Pohl (Galaxy Publishing Corporation, 50¢, 132pp, digest, cover: Skylark DuQuesne by John Pederson, Jr.)
If [Vol. 15 No. 11, Issue 96, November 1965] ed. Frederik Pohl (Galaxy Publishing Corporation, 50¢, 164pp, digest, cover: Masque of the Red Shift by Morrow)
4 · What You Don’t Know About You · Frederik Pohl · ed