TY  - BOOK
AU  - Viezlick,P.P.
ED  - United States.
TI  - NBS frequency and time broad East services: radio stations WWV, WWVH, WWVB, WWVL 
U1  -  658.562 
PY  - 1970///
CY  - Washington, D. C.
PB  - The Department
KW  - Materials
KW  - Standards
KW  - Standards, Engineering
KW  - Specifications
ER  -