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Appearances of Doctor Spectrum

First appearance in The Defenders (Marvel, 1972 series) #13 (May 1974) by Len Wein and Sal Buscema.

Issue Name Publication Date Cover
Giant-Size Defenders (1974 Series) -

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Giant-Size Defenders (1974 Series) -

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Marvel Super Action (1977 Series) -

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Marvel Super Action (1977 Series) -

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Marvel Super Action (1977 Series) -

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The Avengers (1963 Series) -
The Avengers (1963 Series) -
The Avengers (1963 series) #71 December 1969
The Avengers Annual (1967 Series) -

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Thor (2014 Series) -

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