Columbia subject headings:
Harvard subject headings:
Cartoonists--California--Biography.
Comic books, strips, etc.--United States--History and criticism
Comic strip characters in motion pictures.
Hellboy.
Mignola, Mike--Criticism and interpretation.
Princeton subject headings:
Cartoonists--California--Biography.
Comic books, strips, etc.--United States--History and criticism.
Comic strip characters in motion pictures.
Hellboy.
Mignola, Mike--Criticism and interpretation.