Columbia subject headings:
Harvard subject headings:
Naturalists--Germany--Biography.
Neumayer, Georg Balthasar von, 1826-1909--Library--Exhibitions.
Pfälzische Landesbibliothek Speyer--Catalogs--Exhibitions.
Private libraries--Germany--Speyer--Catalogs--Exhibitions.
Princeton subject headings:
Neumayer, Georg Balthasar von, 1826-1909--Library--Exhibitions.