Columbia subject headings:
Geology--Bibliography--Catalogs.
Mineral industries--Bibliography--Catalogs.
Preussische Geologische Landesanstalt. Bibliothek--Catalogs.
Harvard subject headings:
Geology--Bibliography--Catalogs.
Mineral industries--Bibliography--Catalogs.
Preussische Geologische Landesanstalt. Bibliothek--Catalogs.
Princeton subject headings: