Columbia subject headings:
Allingham, Margery, 1904-1966--Characters--Albert Campion.
Campion, Albert (Fictitious character)
Detective and mystery stories, English--History and criticism.
Harvard subject headings:
Allingham, Margery, 1904-1966--Characters--Albert Campion.
Campion, Albert (Fictitious character)
Detective and mystery stories, English--History and criticism.
Private investigators in literature.
Princeton subject headings:
Allingham, Margery, 1904-1966--Bibliography.
Allingham, Margery, 1904-1966--Characters--Albert Campion.
Allingham, Margery, 1904-1966--Criticism and interpretation.