Columbia subject headings:
Educational change--Congresses.
Educational innovations--Congresses.
Educational sociology--Research--Congresses.
Harvard subject headings:
Education--Research--Congresses
Educational change--Congresses
Educational innovations--Congresses.
Educational sociology--Research--Congresses.
Princeton subject headings:
Education--Research--Congresses.
Educational innovations--Congresses.
Educational sociology--Research--Congresses.