TY  - BOOK
AU  - Luhmann,Niklas
TI  - Essays on self-reference
SN  - 0231063687
AV  - HM 131 L951e 1990
U1  - 302.2 
PY  - 1990///
CY  - New York
PB  - Columbia University Press
KW  - Social systems
KW  - Autopoiesis
KW  - Communication
KW  - Social aspects
N1  - Includes bibliographical references
ER  -