Columbia subject headings:
Harvard subject headings:
Child abuse--Prevention--Congresses.
Child labor--Congresses.
Children of working parents--Congresses.
Children--Services for--Congresses.
Vocational guidance--Congresses
Princeton subject headings:
Child abuse--Prevention--Congresses.
Child labor--Congresses.
Children of working parents--Congresses.
Children--Services for--Congresses.
Vocational guidance--Congresses.