The Human Dilemma #1 (2004) (Concrete: The Human Dilemma)

- Dark Horse Comics

 featuring Ronald Lithgow/Concrete.

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The Human Dilemma #2 (2005) (Concrete: The Human Dilemma)

- Dark Horse Comics

 featuring Ronald Lithgow/Concrete.

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The Human Dilemma #3 (2005) (Concrete: The Human Dilemma)

- Dark Horse Comics

 featuring Ronald Lithgow/Concrete.

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The Human Dilemma #4 (2005) (Concrete: The Human Dilemma)

- Dark Horse Comics

 featuring Ronald Lithgow/Concrete.

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