TY  - BOOK
AU  - Albert,Mathias
AU  - Lena,Hilkermeier
TI  - Observing international relations : niklas luhmann and world politics 
SN  - 9780415315388
U1  - 327.101 22
PY  - 2004///
CY  - New York 
PB  - Routledge
ER  -