TY  - BOOK
AU  - Chapman, E. H.
TI  - Wireless to-day
T2  - The Pageant of progress
U1  - 621.384 CHA 
PY  - 1936///
CY  - London
PB  - Oxford University Press
KW  - Radio technology
KW  - Wireless transmission
KW  - Broadcasting – Radio systems
ER  -