TY  - BOOK
AU  - Petrie, R. D. 
AU  - Taylor, J. C.
ED  - British Broadcasting Corporation
TI  - Programme switching, control and monitoring in sound broadcasting (no.28)
U1  - 621.388 
PY  - 1960///
CY  - New York
PB  - British Broadcasting Corporation
KW  - Sound Braodcasting
ER  -