TY  - BOOK
AU  - Berk,Richard A.
TI  - Collective behavior
T2  - Elements of sociology
SN  - 0697075257
U1  - 304 
PY  - 1974///]
CY  - Dubuque, Iowa
PB  - W. C. Brown Co
KW  - Collective behavior
KW  - Crowds
N1  - Includes bibliographies
ER  -