Columbia subject headings:
Occupational training--Congresses.
Vocational education--Congresses.
Vocational evaluation--Congresses.
Harvard subject headings:
Occupational training--Congresses
Vocational education--Congresses.
Vocational evaluation--Congresses.
Princeton subject headings:
Occupational training--Congresses.
Vocational education--Congresses.
Vocational evaluation--Congresses.