TY  - BOOK
AU  - Shorter, D. E. L.
AU  - Manson, W. I.
AU  - Wigan, E. R.
ED  - BBC engineeringing monograph
TI  - Analysis and measurement of programme levels (no.16)
U1  - 621.388 
PY  - 1958///
CY  - New York
PB  - British Broadcasting Corporation
KW  - Programme levels
N1  - Contents: Pt.1.Investigation of extreme values of sound pressure  -- pt.2. A description of an optical instrument for monitoring sound signals
ER  -