TY  - BOOK
AU  - PETERSEN William
TI  - Background to Ethnic confict
T2  - Inernational studies i sociology and sociol anthropology
SN  - 9004060197
U1  - "Sigma, L9/RR" 
PY  - 1979///
CY  - Leide
PB  - E J Brill press    
ER  -