Columbia subject headings:
Education--United States--Statistics--Periodicals.
High school graduates--United States--Statistics--Periodicals.
Harvard subject headings:
Education--United States--Statistics--Periodicals
High school graduates--United States--Statistics--Periodicals.
Princeton subject headings:
Education--United States--Statistics--Periodicals.
High school graduates--United States--Statistics--Periodicals.
Periodicals.
Statistics.