Cover pencils and inks credits from Julius Schwartz's editorial records, provided to the GCD by DC Comics.
Pencils and inks credits from Julius Schwartz's editorial records, provided to the GCD by DC Comics.
Information for this sequence from Arthur Lortie.
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
Letters from S.W. asking about comets, E.S. asking about the color of the Martian sky and S.P. about how the mass of stars and planets are measured.
Pencils and inks credits from Julius Schwartz's editorial records, provided to the GCD by DC Comics.