Detective Comics (1937)
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Key Facts
2nd appearance and origin of Martian Manhunter
Batman reveals that he operated under the Robin moniker when he was a boy
1st appearance of Harvey Harris, an early mentor of Bruce Wayne
Key Facts
2nd appearance and origin of Martian Manhunter
Batman reveals that he operated under the Robin moniker when he was a boy
1st appearance of Harvey Harris, an early mentor of Bruce Wayne
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