| 000 | 00524nam a2200145 a 4500 | ||
|---|---|---|---|
| 005 | 20220228110532.0 | ||
| 035 | _aF8901000704021 | ||
| 084 | _aHRB SHP 13 1972 | ||
| 245 | _aRadio spectrum frequency management / Highway Research Boar-d. | ||
| 260 | _aWashington, D.C. : HRB | ||
| 300 | _a32 p. | ||
| 440 | _aSynthesis of Highway Practice ; 13 / Highway Research Board | ||
| 690 | _aComunicaciones y tránsito.Radio - Transmisión - Leyes y reglamentos. | ||
| 710 | _aE.U.A. National Research Council. Highway Research Board. | ||
| 999 |
_c55541 _d55541 |
||