The pages were re-arranged to fit the smaller paperback size; hence story page counts do not match the originals'.
Reproduced panel reprints from:
From Weird Fantasy (EC, 1951 series) #15 [panel from By George page 4 flipped]
From Weird Science (EC, 1951 series) #17 [edited panel from Plucked! page 7]
List of stories and their page numbers. No actual credits.