in House of Mystery (DC, 1951 series) #229 (February-March 1975) [creature only]Creature reprint spotted by Frank Battaglia (submitted via the error list, December 2006).
Inside front cover.
Introduction page.
from My Greatest Adventure (DC, 1955 series) #8 (March-April 1956)
from Sensation Mystery (DC, 1952 series) #116 (July-August 1953)
from My Greatest Adventure (DC, 1955 series) #14 (March-April 1957)Three gag pages. Not sure if they are by the same artist or more than one artist.
from House of Secrets (DC, 1956 series) #2 (January-February 1957)Three gag panels.
from My Greatest Adventure (DC, 1955 series) #12 (November-December 1956)Three gag panels. Not sure how many artists.
from Sensation Mystery (DC, 1952 series) #110 (July-August 1952)
from The Phantom Stranger (DC, 1952 series) #1 (August-September 1952)
from My Greatest Adventure (DC, 1955 series) #20 (March-April 1958)
from My Greatest Adventure (DC, 1955 series) #15 (May-June 1957)Four one-panel gags.
from Tales of the Unexpected (DC, 1956 series) #15 (July 1957)
from Tales of the Unexpected (DC, 1956 series) #24 (April 1958)
from House of Mystery (DC, 1951 series) #49 (April 1956)Inside back cover. Three gag panels.
Same as front cover, sans title and trade dress. On back cover.