TY  - BOOK
AU  - Powis,David
TI  -  The signs of crime: a field manual for Police 
U1  - 343.111 
PY  - 1977///
CY  - London
PB  - New York : McGraw-Hill Book Co. (UK), 
KW  - Criminal law
KW  - qrmak
KW  -  Police training
UR  - https://fll.law.cu.edu.eg/fulltext/bks/B10-08918.pdf
ER  -