Columbia subject headings:
Geology, Economic--Periodicals.
Mineralogy--Periodicals.
Petrology--Periodicals.
Harvard subject headings:
Geology, Economic--Periodicals.
Mineralogy--Periodicals
Petrology--Periodicals
Princeton subject headings:
Geology, Economic--Japan--Periodicals.
Mineralogy--Japan--Periodicals.
Petrology--Japan--Periodicals.