Columbia subject headings:
Romanies.
Wittich, Engelbert, 1878-1937--Bibliography.
Wittich, Engelbert, 1878-1937.
Harvard subject headings:
Romanies.
Wittich, Englebert, 1878-1937--Bibliography.
Wittich, Englebert, 1878-1937.
Princeton subject headings:
Romanies--Germany.