Columbia subject headings:
Animals in literature--Congresses.
Civilization, Medieval--Congresses.
Human-animal relationships--Congresses.
Human-plant relationships--Congresses.
Plants in literature--Congresses.
Harvard subject headings:
Animals in literature--Congresses.
Civilization, Medieval--Congresses
Human-animal relationships--Congresses.
Human-plant relationships--Congresses.
Plants in literature--Congresses.
Princeton subject headings: