Columbia subject headings:
Comic books, strips, etc.
Comic books, strips, etc.--United States.
Comics (Graphic works)
Eisner, Will. Spirit.
Spirit (Comic strip)
Superhero comic books, strips, etc.
Harvard subject headings:
Comic books, strips, etc.
Comic books, strips, etc.--United States.
Comics (Graphic works)
Eisner, Will. Spirit.
Spirit (Comic strip)
Superheroes--Comic books, strips, etc.
Princeton subject headings: