Columbia subject headings:
Law--Political aspects--Congresses.
Luhmann, Niklas, 1927-1998.
Social systems--Congresses.
Sociological jurisprudence--Congresses.
System theory--Congresses.
Harvard subject headings:
Law--Political aspects--Congresses
Luhmann, Niklas, 1927-1998--Congresses.
Social sciences--Philosophy--Congresses
Social systems--Congresses
Princeton subject headings:
Law--Political aspects--Congresses.
Luhmann, Niklas, 1927-1998.
Social systems--Congresses.
Sociological jurisprudence--Congresses.
System theory--Congresses.