Columbia subject headings:
Harvard subject headings:
Earth sciences--Congresses
Engineering--Congresses.
Engineering--Periodicals
Science--Congresses
Science--Periodicals
Technology--Periodicals
Princeton subject headings:
Earth sciences--Congresses.
Engineering--Congresses.
Engineering--Periodicals.
Periodicals.
Science--Congresses.
Science--Periodicals.
Technology--Periodicals.