X-Men Omnibus #1

Werner Roth, Roy Thomas, Jack Sparling, Stan Lee, Alex Toth with Jack Kirby (Illustrator)

X-Men Omnibus #2

Roy Thomas, George Tuska with Don Heck, Gary Friedrich, Jim Steranko, Werner Roth, John Verpoorten, Linda Fite, Sal Buscema, Arnold Drake, Dan Adkins, Chris Claremont, John Buscema, Barry Windsor-Smith, Tom Sutton, Neal Adams, Ross Andru, Jerry Siegel, Denny O'Neil