Columbia subject headings:
Harvard subject headings:
African languages--Research--Germany.
Colonies
Colonies--Congresses.
Language policy--Colonies.
Language policy--Congresses.
Languages in contact--Congresses.
Languages in contact--History.
Linguistics--Historiography.
Linguistics--History
Pacific Area--Languages--Research--Germany.
Princeton subject headings:
African languages--Research--Germany.
Colonies.
Language policy--Colonies.
Languages in contact--History.
Linguistics--Historiography.
Linguistics--History.
Pacific Area--Languages--Research--Germany.