TY  - BOOK
AU  - Walker,Samuel
TI  - The police in America: an introduction 
U1  - 363.2/0973 20
PY  - 1992///
CY  - New York
PB  - McGraw-Hill
KW  - Police administration
KW  - United States
KW  - Police
KW  - An ninh quốc gia
KW  - Cảnh sát
KW  - Mỹ
ER  -