Columbia subject headings:
Booksellers and bookselling--Germany--History.
Distributors (Commerce)--Germany--History.
Koch, Neff & Oetinger & Co.
Koch, Neff & Oetinger Verlagsauslieferung.
Koch, Neff & Volckmar.
Koehler & Volckmar.
Harvard subject headings:
Booksellers and bookselling--Germany--History.
Distributors (Commerce)--Germany--History.
Koch, Neff & Oetinger Verlagsauslieferung.
Koch, Neff & Volckmar.
Koehler & Volckmar.
Princeton subject headings: