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- Voiced by Lex Lang.
- 7 Appearances of Joseph Martin (DCAU)
- 1 Images featuring Joseph Martin (DCAU)
- Quotations by or about Joseph Martin (DCAU)
- Character Gallery: Joseph Martin (DCAU)
- Atomic Skull at dccomics.com
- Atomic Skull at Wikipedia.org
- Atomic Skull at the DC Animated Universe Wikia