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| 100 | _aEncyclopaedia Britannica | ||
| 020 | _a978-1-59339-397-7 | ||
| 942 | _cBK | ||
| 654 | _aSpace exploration | ||
| 654 | _a | ||
| 245 | _aSpace exploration | ||
| 260 |
_aChicago _bEncyclopaedia Britannica lnc. _c2009 |
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| 082 | _aR503 | ||
| 300 | _a101 | ||
| 999 |
_c416972 _d416972 |
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| 041 | _aeng | ||