Columbia subject headings:
Harvard subject headings:
College students--United States--Longitudinal studies.
College students--United States--Statistics
High school graduates--United States--Longitudinal studies
High school graduates--United States--Statistics.
Princeton subject headings:
College students--United States--Longitudinal studies.
College students--United States--Statistics.
High school graduates--United States--Longitudinal studies.
High school graduates--United States--Statistics.
Statistics.