Columbia subject headings:
Cognition in children--Congresses.
Learning, Psychology of--Congresses.
Logic, Symbolic and mathematical--Congresses.
Harvard subject headings:
Cognition in children--Congresses.
Learning, Psychology of--Congresses.
Logic, Symbolic and mathematical--Congresses.
Princeton subject headings:
Cognition in children--Congresses.
Learning, Psychology of--Congresses.
Logic, Symbolic and mathematical--Congresses.