Columbia subject headings:
Geology--Dictionaries--Portuguese.
Portuguese language--Dictionaries--English.
Portuguese language--Dictionaries--German.
Harvard subject headings:
Geology--Dictionaries--Portuguese.
Portuguese language--Dictionaries--English.
Portuguese language--Dictionaries--German.
Princeton subject headings:
Dictionaries.
Geology--Dictionaries--Portuguese.
Portuguese language--Dictionaries--English.
Portuguese language--Dictionaries--German.