TY  - BOOK
AU  - U S Department of Commerce
TI  - Radio Instruments and measurements; Circular of the National Bureau of Standards C74
PY  - 1937///
CY  - Government printing Div.
PB  - USA
UR  - http://14.139.222.13:80/cgi-bin/koha/opac-detail.pl?biblionumber=674
ER  -