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Justice League of America #56 cover
DC ComicsSILVER AGE

JUSTICE LEAGUE OF AMERICA #56

“The Negative Crisis on Earths One-Two!”

September 1967

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1EDITIONS
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artistMike Sekowsky, Sid GreeneeditorJulius Schwartz
Justice LeagueJustice Society of America
Database/Justice League of America/56 · "The Negative Crisis on Earths One-Two!"

The JLA and JSA team up to stop the black matter villains on Earth-2, using artificial means to power up four of their own with black matter. But the gambit has unexpected and dangerous consequences!

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Cover price
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Pages
36

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CHARACTER APPEARANCES

Hourman (Rex Tyler)

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Johnny Thunder

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Mister Terrific (Sloane)

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Superman

Superman

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Wildcat

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Wonder Woman

Wonder Woman

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Green Arrow

Green Arrow

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Hal Jordan

Hal Jordan

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Hawkman

Hawkman

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Flash (Barry Allen)

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