Columbia subject headings:
Harvard subject headings:
Youth--Conduct of life--Research--Congresses.
Youth--Research--Arab countries--Congresses.
Youth--Research--Germany--Congresses.
Youth--Research--Moral and ethical aspects--Congresses.
Princeton subject headings:
Youth--Research--Arab countries--Congresses.
Youth--Research--Germany--Congresses.
Youth--Research--Moral and ethical aspects--Congresses.