TY  - RPRT
TI  - Circular of the Bureau of Standards no. 133: description and operation of an electron-tube detector unit for simple radio receiving outfits
PY  - 1922
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 133
DO  - 10.6028/NBS.CIRC.133
ER  -