Columbia subject headings:
Comic books, strips, etc.--United States.
Comics (Graphic works)
Graphic novels.
Superhero comic books, strips, etc.
Supervillains--Comic books, strips, etc.
Harvard subject headings:
Comic books, strips, etc.--United States.
Comics (Graphic works)
Graphic novels
Heroes--Comic books, strips, etc.
Superheroes--Comic books, strips, etc.
Supervillains--Comic books, strips, etc.
Princeton subject headings: