The original Leo first appeared in Avengers #72 (January 1970), and was created by Roy Thomas and Sal Buscema.
The character subsequently appears in Avengers #120-123 (February–May 1974), Ghost Rider #7 (August 1974), Iron Man #184 (July 1984), and West Coast Avengers #26 (November 1987), in which he is killed.
Leo appeared as part of the "Zodiac" entry in the Official Handbook of the Marvel Universe Deluxe Edition #20.
Read more about this topic: Leo (comics)
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... Volume three of the Tales II Trilogy, The War of the Lance, is built around the history of Krynn during the War of the Lance ... the major events of Krynn's past, and the history of the War of the Lance is given in great detail on all the battles and political machinations of the world-shaping conflict ...
... In the US, the novel appeared in the December 1969 issue of Cosmopolitan magazine. ...
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