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_a520 _bR988c 1997 |
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_9102790 _aRyan, Jay, _eautor |
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_aCycles : _ban introduction to astronomy and time / _cby Jay Ryan. |
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_aSan Francisco : _bAstronomical Society of the Pacific, _c1997. |
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_a32 páginas : _bilustraciones |
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_atexto _btxt _2rdacontent |
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_ano mediado _bn _2rdamedia |
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_avolumen _bnc _2rdacarrier |
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_91471 _aAstronomía. |
| 740 | 0 | _aIntroduction to astronomy and time. | |
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