Columbia subject headings:
Diapause--Congresses.
Insects--Development--Congresses.
Insects--Variation--Congresses.
Harvard subject headings:
Diapause--Congresses.
Insects--Development--Congresses.
Insects--Variation--Congresses.
Princeton subject headings:
Diapause--Congresses.
Insects--Development--Congresses.
Insects--Variation--Congresses.