Definitely the first Marvel character or team that comes to mind for the letter “X” right? : r/comicbooks
Stan Lee's Famous Firsts | Marvel
Who was the first established mainstream hero type comic book character that either DC or Marvel killed off and left that way? - Science Fiction & Fantasy Stack Exchange
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Captain Marvel first appearance under Mar-Vell alias (1967 - Marvel Superheroes #12) | Captain marvel, Marvel comics covers, Marvel comic books
Marvel Comic Character: Who Was Marvel's First Superhero?
Who was the first established mainstream hero type comic book character that either DC or Marvel killed off and left that way? - Science Fiction & Fantasy Stack Exchange
Marvel Firsts: The 1960s Vol 1 1 | Marvel Database | Fandom
Rare Copy of First Marvel Comic Sells for $2.4 Million - The New York Times
The History, Characters, and Legacy of the First Marvel Comic
What was the first Marvel comic Stan Lee ever made? - Quora
The first Marvel comic just sold for $1.26m. | World Economic Forum
Which Marvel character was made first? - Quora
CGC-certified Marvel Comics #1 on Exhibit in Columbus, Ohio | CGC
The History, Characters, and Legacy of the First Marvel Comic - Nerdist
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The Top Key Issue Marvel First Appearances of All Time! - HubPages
Black Panther, Vol. 1 No. 4 | Smithsonian Institution
Marvel's First 10 Superhero Comic Book Series, In Chronological Order
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ALPHA FLIGHT #106-MARVEL Northstar-First gay character in comic books 2nd print | eBay
Namor - Wikipedia
Rare Marvel comic sells for £1.8 million! - BBC Newsround
