Columbia subject headings:
Harvard subject headings:
Librarians--Certification--United States--Periodicals.
School administrators--Certification--United States--Periodicals.
Student counselors--Certification--United States--Periodicals.
Teachers--Certification--United States--Periodicals.
Princeton subject headings:
Librarians--Certification--United States--Periodicals.
School administrators--Certification--United States--Periodicals.
Student counselors--Certification--United States--Periodicals.
Teachers--Certification--United States--Periodicals.