Columbia subject headings:
Advice columnists--Comic books, strips, etc.
Barcelona (Spain)--Comic books, strips, etc.
Comic books, strips, etc.--Spain.
Comics (Graphic works)
Detective and mystery comics.
Graphic novels.
Hypnotists--Comic books, strips, etc.
Missing persons--Comic books, strips, etc.
Murder--Investigation--Comic books, strips, etc.
Private investigators--Comic books, strips, etc.
Radio programs--Comic books, strips, etc.
Harvard subject headings:
Advice columnists--Comic books, strips, etc.
Barcelona (Spain)--Comic books, strips, etc.
Detective and mystery comics
Graphic novels
Hypnotists--Comic books, strips, etc.
Missing persons--Comic books, strips, etc.
Murder--Investigation--Comic books, strips, etc.
Private investigators--Comic books, strips, etc.
Radio programs--Comic books, strips, etc.
Princeton subject headings: