Columbia subject headings:
Einstein, Albert, 1879-1955--Anniversaries, etc.
Research--Congresses.
Science--Congresses.
Harvard subject headings:
Einstein, Albert, 1879-1955--Anniversaries, etc.
Research--Congresses
Science--Congresses
Princeton subject headings:
Einstein, Albert, 1879-1955--Anniversaries, etc.
Research--Congresses.
Science--Congresses.