Columbia subject headings:
Geochemistry--Periodicals.
Mineralogy--Periodicals.
Petrology--Periodicals.
Harvard subject headings:
Geochemistry--Periodicals
Mineralogy--Periodicals
Petrology--Periodicals
Princeton subject headings:
Geochemistry--Periodicals.
Mineralogy--Periodicals.
Periodicals.
Petrology--Periodicals.