Columbia subject headings:
Harvard subject headings:
Bees in literature--Congresses.
Bonsels, Waldemar, 1880 or 1881-1952--Criticism and interpretation.
Bonsels, Waldemar, 1880 or 1881-1952. Biene Maja und ihre Abenteuer--Congresses.
Children's literature, German--20th century--History and criticism--Congresses.
Insects in literature--Congresses.
Reptiles in literature--Congresses.
Princeton subject headings:
Bees in literature--Congresses.
Bonsels, Waldemar, 1880 or 1881-1952--Criticism and interpretation.
Bonsels, Waldemar, 1880 or 1881-1952. Biene Maja und ihre Abenteuer--Congresses.
Children's literature, German--20th century--History and criticism--Congresses.
Insects in literature--Congresses.
Reptiles in literature--Congresses.