Columbia subject headings:
Animals in literature--Congresses.
Ecocriticism in literature--Congresses.
Ecocriticism--Congresses.
Ecology in literature--Congresses.
Poetry, Modern--History and criticism--Congresses.
Harvard subject headings:
Animals in literature--Congresses.
Ecocriticism in literature--Congresses.
Ecology in literature--Congresses.
Poetry, Modern--History and criticism--Congresses.
Princeton subject headings:
Animals in literature--Congresses.
Ecocriticism in literature--Congresses.
Ecocriticism--Congresses.
Ecology in literature--Congresses.
Poetry, Modern--History and criticism--Congresses.