Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics [July 2007].
Advertisement for Leave It to Binky (DC, 1968 series) #71; Our Army At War (DC, 1952 series) #215; Unexpected, The (DC, 1968 series) #117; Flash, The (DC, 1959 series) #194. Small images of covers.
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (April 2007).
Advertisement for DC Special (DC, 1968 series) #6 and Batman (DC, 1940 series) #218. Small images of covers.
Letters from: Madelein Robins; Gary Skinner; Jeff Webb; William Young; Bernard Williams
Advertisement for Detective Comics (DC, 1937 series) #395 and Green Lantern (DC, 1960 series) #74. Small images of covers.
Advertisement for Superboy (DC, 1949 series) #162 and Action Comics (DC, 1938 series) #384. Small images of covers.
Four examples of science facts
Extra section of Green Lantern's Mail Chute. Letters from: Guy H. Lillian III; Rand B. Lee
Advertisement for Showcase (DC, 1956 series) #88