TY  - BOOK
AU  - Feldman Martin Ed.
AU  -  Seifman Eli Ed.
TI  - Social studies :  Structure, models and strategis   
SN  - 138189064
U1  - Sigma, K9 
PY  - 1969///
CY  - New Jersey 
PB  - Englewood Cliffs U S A     
KW  - Social Sciences
ER  -