First appearance of the Time Trapper. The Legionnaires submit to tests of their ability to keep secret their greatest weapon from Commissioner Wilson.
The price of "Adventure Comics #321-Very Fine (7.5 – 9)" at Up Up & Away! Cincinnati (Blue Ash) is USD $70.00.
"Adventure Comics #321-Very Fine (7.5 – 9)" is associated with the Legion of Super-Heroes, and Superboy brands.
The publisher of "Adventure Comics #321-Very Fine (7.5 – 9)" is DC Entertainment.
The genres of "Adventure Comics #321-Very Fine (7.5 – 9)" are Advocacy, Humor, Non-Fiction, and Superheroes.
"Adventure Comics #321-Very Fine (7.5 – 9)" falls under the category of Back Issues (Rare).
The artists of "Adventure Comics #321-Very Fine (7.5 – 9)" are Curt Swan, Sheldon Moldoff, John Forte, Henry Boltinoff, and John Sikela.
The writers of "Adventure Comics #321-Very Fine (7.5 – 9)" are Otto Binder, Edmond Hamilton, Jack Schiff, and Henry Boltinoff.