Columbia subject headings:
Education--Botswana--History.
Teachers' unions--Botswana--History.
Harvard subject headings:
Bechuanaland Protectorate African Teachers' Association--History.
Botswana Teachers Union--History.
Education--Botswana--History.
Teachers' unions--Botswana--History.
Princeton subject headings:
Education--Botswana--History.
Teachers' unions--Botswana--History.