Columbia subject headings:
Harvard subject headings:
Edition Iltis (Saarbrücken, Germany)--Bibliography.
Edition Iltis (Saarbrücken, Germany)--History.
Esperanto imprints--Germany--Saarbrücken--History.
Languages, Artificial--Bibliography.
Publishers and publishing--Germany--Biography
Publishers and publishing--Germany--Saarbrücken--History.
Princeton subject headings:
Edition Iltis--History.
Esperanto--Bibliography.