Columbia subject headings:
Harvard subject headings:
Adult education--England.
Adult education--United States.
Continuing education--England.
Continuing education--United States.
Education, Higher--England.
Education, Higher--United States
Princeton subject headings:
Adult education--England.
Adult education--United States.
Continuing education--England.
Continuing education--United States.
Education, Higher--England.
Education, Higher--United States.