from Strange Adventures (DC, 1950 series) #236 (May-June 1972)This cover is adapted from the cover of Mystery in Space (DC, 1951 series) #27 (August-September 1955).
from Mystery in Space (DC, 1951 series) #27 (August-September 1955)
from Adventure Comics (DC, 1938 series) #337 (October 1965)This reprint is from the reprint in Adventure Comics (DC, 1938 series) #411 (October 1971).
from Adventure Comics (DC, 1938 series) #337 (October 1965)This reprint is from the reprint in Adventure Comics (DC, 1938 series) #411 (October 1971).
from Detective Comics (DC, 1937 series) #178 (December 1951)This printing is from the reprint in Adventure Comics (DC, 1938 series) #413 (December 1971).
from Action Comics (DC, 1938 series) #239 (April 1958)This printing of the story is from the reprint in Legion of Super-Heroes (DC, 1973 series) #2 (March 1973).
from Action Comics (DC, 1938 series) #417 (October 1972)
from House of Secrets (DC, 1956 series) #26 (November 1959)This printing of the story is from the reprint in House of Mystery (DC, 1951 series) #200 (March 1972).