| 000 | 00594nam a22001937a 4500 | ||
|---|---|---|---|
| 003 | BD-DhUL | ||
| 005 | 20150115174658.0 | ||
| 008 | 150115s1949 -usa|||| |||| 001 0 eng d | ||
| 040 |
_aBD-DhUL _cBD-DhUL |
||
| 082 | 0 | 0 |
_bDEI _a621.384 |
| 110 | 1 | _aU. S. Department of Commerce. | |
| 245 | 1 | 0 |
_aIouspheric radio propagation / _cU. S. Department of Commerce. |
| 260 |
_aWashington : _bNational Bureau of Standards , _c1949. |
||
| 300 |
_aiv, 209 p. : _bills. ; _c25 cm. |
||
| 490 | 0 | _aNational Bureau of Standards Circular 462. | |
| 500 | _aIncludes index. | ||
| 650 | 0 | _aRadio | |
| 942 |
_2ddc _cBK |
||
| 999 |
_c31877 _d31877 |
||