TY  - BOOK
AU  - Bales, Robert Freed
TI  - Social interaction systems : theory and measurement 
SN  - 978 0 7658 0872 1
U1  - 302 BAL 
PY  - 0000/// Transaction Publishers
CY  - New Brunswick
PB  -  NJ 
KW  - SOCIAL INTERACTION
ER  -