Columbia subject headings:
Botany--Periodicals.
Geology--Periodicals.
Mineralogy--Periodicals.
Paleontology--Periodicals.
Science.
Zoology--Periodicals.
Harvard subject headings:
Botany--Periodicals
Geology--Periodicals
Mineralogy--Periodicals
Paleontology--Periodicals
Zoology--Periodicals
Princeton subject headings:
Botany--Periodicals.
Geology--Periodicals.
Mineralogy--Periodicals.
Paleontology--Periodicals.
Periodicals.
Science.
Zoology--Periodicals.