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| 040 | _aSipr | ||
| 041 | _aeng | ||
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_c71552 _d71551 |
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| 100 | _aBucknam, Mark | ||
| 245 |
_aAsteroid threat? _cMark Bucknam and Robert Gold _bthe problem of planetary defence |
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| 650 |
_aspace _xdefence |
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| 773 | 0 |
_tSurvival _g2008(50):5, pp. 141-156 |
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| 942 | _cPART | ||
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_c71361 _d71361 |
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