TY  - BOOK
AU  - Pick Otto
AU  -  Critchley Julian
TI  - Collective security
T2  - Key concepts in political science ed by Leonard Schapiro
U1  - W:91, L43-;1-;2 (TTW) 
PY  - 1974///
CY  - London
PB  - Macmillan       
KW  - POLITICAL SCIENCE
ER  -