TY  - BOOK
AU  - Ragin Charles C
TI  - Comparative method :  Moving beyond qualitative and   
SN  - 0520058348
U1  - Sigma b4, M7 
PY  - 1987///
CY  - Berkeley
PB  - University of California press       
KW  - Social Science
N1  - Bib p 173-79
ER  -