Sources:

Dates provided by Mike's Amazing World Newsstand.
Credits, Issue numbers and length of title runs provided by Grand Comics Database.
75 Years of DC Comics: The Art of Modern Mythmaking, Paul Levitz, Taschen, 2010
75 Years of Marvel Comics: From the Golden Age to the Silver Screen, Roy Thomas, Tachen, 2014
Alter Ego, Vol 2, Issue #10, 11, 14 (2001), 38 (2004)
Forbidden Adventures: The History of the American Comics Group, Michael Vance, Greenwood Press, 1996
The Story Behind SkyMasters, Jon B. Cooke, 1997
DC Millennium Edition reprints of Action Comics #252, Adventure Comics #247, The Brave and the Bold #28, Detective Comics #225, The Flash #123, Our Army at War #81, Showcase #4, Showcase #9 and Showcase #22 (2000, 2001)
The Overstreet Comic Book Price Guide 42nd & 44th editions, Robert M. Overstreet, Gemstone Publishing, 2012, 2014
The Standard Catalog of Comic Books, John Jackson Miller, Maggie Thompson, Peter Bickford, Brent Frankenhoff, 2002, Krouse Publications
The Comic Book, Paul Sassienie, Ebury Press, 1994
The Steranko History of Comics Vol 1 and 2, James Steranko, SuperGraphics, 1970, 1972
Marvel: Five Fabulous Decades of the World's Greatest Comics, Les Daniels, Abrams, 1993
DC Comics: Sixty Years of the Worlds Favorite Comic Book Heroes, Les Daniels, Little, Brown & Company, 1995
Batman & Me: An Autobiography, by Bob Kane and Tom Andrae, Eclipse, 1989
Hero Special Edition: The 100 Most Important Comics of all time by Warrior Publications, 1994.
Don Markstein's Toonopedia
Spidey Sense and About Steve Ditko blog posts by Mark Evanier, 2024
An Incessantly Asked Question blog post by Mark Evanier, undated
Fire & Water: Bill Everett, the Sub-Mariner and the Birth of Marvel Comics, Blake Bell, Fantagraphics, 2010
Marvel Comics: The Untold Story, Sean Howe, Harper, 2012
Bill Everett Panel, with Wendy Everett, moderated by Blake Bell, San Diego Comic Con, 2010
American Comic Book Chronicles: 1960-1964, John Wells, TwoMorrows Publishing, 2013
American Comic Book Chronicles 1964-1969, John Wells, TwoMorrows Publishing, 2013
The Secret History Of Marvel Comics, Blake Bell and Michael J. Vassallo, Fantagraphics Books, 2013
James Warren: Empire of Monsters, Bill Schelly, Fantagraphic Books, 2019
Superhero Comics of the Silver Age, Mike Benton, Taylor Publishing Company, 1994
The Marvel Vault, Roy Thomas and Peter Sanderson, Running Press, 2007
The DC Vault, Martin Pasko, Running Press, 2008