TY  - GEN
AU  - Crook, W. E.
TI  - Elementary Handbook for Wireless Operators
U1  - 621.3825,CRO 
PY  - 1941///
CY  - London
PB  - Sir Issac Pitman
KW  - Telecommunication engineering
N1  - Signaling (Page-1), Electrical principles (Page-6), The basis of radio communications (Page-23), The recievers (Page-51)
ER  -