TY  - BOOK
AU  - Berk,Richard A.
TI  - Collective behavior / 
T2  - Elements of sociology
SN  - 0131406574
AV  - HM 132 .B47 1972
U1  - 301.18/2 
PY  - 1972///
CY  - Dubuque, Iowa
PB  - W. C. Brown Co.
KW  - Collective behavior
KW  - Crowds
N1  - Includes bibliographies
ER  -