TY  - BOOK
AU  - Hemphill, Charles F.
AU  - 
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 2
PY  - 1971///46
CY  - Homewood, Ill
PB  - Dow Jones-Irwin
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Security measures
KW  - Industries
N1  - Bibliography: p. 301-305; 5
ER  -