Printed in U.S.A.
On sale date from the publication date reported to the U.S. Copyright Office found in the Catalog of Copyright Entries, Third Series, Volume 8, Part 2, Number 1, Periodicals, January-June 1954. Class B periodical. Copyright registration number B455189.
See Superman (DC, 1939 series) #145 (May 1961): "The Interplanetary Circus".
Inker identification by Bob Hughes, August 2005
Listing of the members of the National Comics (DC) Editorial Advisory Board. The Board includes: Dr. Lauretta Bender (Professor of Clinical Psychiatry, New York University College of Medicine), Josette Frank (Consultant on Children's Reading Child Study Association of America), Dr. W. W. D. Sones (Professor of Education and Director of Curriculum Study, University of Pittsburgh), and Dr. S. Harcourt Peppard (Director, Essex County Juvenile Clinic, Newark, New Jersey).
Also lists all the current titles being published National Comics (DC).
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