| 000 | 00577nam a22001697a 4500 | ||
|---|---|---|---|
| 005 | 20210105150016.0 | ||
| 008 | 210105b xxu||||| |||| 00| 0 eng d | ||
| 040 | _cIIT Kanpur | ||
| 041 | _aeng | ||
| 100 | _aNorum, Thomas D. | ||
| 245 |
_aMeasured and calculated transmission losses of sound waves through a helium layer [NASA TN D-7230] _cThomas D. Norman |
||
| 260 |
_aWashington, D. C. _bNational Aeronautics and Space Administration _c1973 |
||
| 300 | _a23p | ||
| 440 | _aNational Aeronautics and Space Administration (NASA) | ||
| 650 | _aHelium layer | ||
| 942 | _cREF | ||
| 999 |
_c563806 _d563806 |
||