Columbia subject headings:
College teachers--Employment--United States.
College teaching--Vocational guidance--United States.
Doctor of philosophy degree--United States.
Graduate students--Employment--United States.
Harvard subject headings:
College teachers--Employment--United States.
College teachers--Vocational guidance--United States.
College teaching--Vocational guidance--United States
Doctor of philosophy degree--United States.
Graduate students--Employment--United States.
Princeton subject headings: