TY  - BOOK
AU  - Albert Mathias
AU  -  Hilkermeier Lena
TI  - Observing International relations:  Niklas Luhmann and world politics   
T2  - New International Relations Series
SN  - 0415315387
U1  - Y9(W), P4 
PY  - 2004///
CY  - London
PB  - Routledge          
KW  - Political Sociology
N1  - Bibliography: P 226-51
ER  -