Columbia subject headings:
Harvard subject headings:
Humboldt, Alexander von, 1769-1859--Archaeological collections--Exhibitions.
Minerals--Collection and preservation--Germany--Berlin--Exhibitions.
Museum für Naturkunde in Berlin--Catalogs.
Rocks--Collection and preservation--Germany--Berlin--Exhibitions.
Princeton subject headings:
Catalogs.
Humboldt, Alexander von, 1769-1859--Archaeological collections--Exhibitions.
Minerals--Collection and preservation--Germany--Berlin--Exhibitions.
Museum für Naturkunde in Berlin--Catalogs.
Rocks--Collection and preservation--Germany--Berlin--Exhibitions.