Columbia subject headings:
College teachers--United States--Statistics.
Engineering--Research--United States--Statistics.
Engineering--Study and teaching (Higher)--United States--Statistics.
Research--United States--Statistics.
Science--Study and teaching (Higher)--United States--Statistics.
Science--Study and teaching (Higher)--United States.
Universities and colleges--United States--Statistics.
Harvard subject headings:
College teachers--United States--Statistics.
Engineering teachers--United States--Statistics.
Engineering--Research--United States--Statistics.
Engineering--Study and teaching (Higher)--United States--Statistics.
Research--United States--Statistics.
Science teachers--United States--Statistics.
Science--Study and teaching (Higher)--United States--Statistics.
Universities and colleges--United States--Statistics.
Princeton subject headings:
College teachers--United States--Statistics.
Engineering teachers--United States--Statistics.
Science teachers--United States--Statistics.
Science--Study and teaching (Higher)--United States.
Statistics.