Columbia subject headings:
Interpersonal attraction--Congresses.
Love--Congresses.
Marriage--Congresses.
Sex--Congresses.
Harvard subject headings:
Interpersonal attraction--Congresses.
Love--Congresses
Marriage--Congresses
Sex--Congresses
Sexual attraction--Congresses.
Princeton subject headings:
Love--Congresses.
Marriage--Congresses.
Sex--Congresses.
Sexual attraction--Congresses.