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_aBarr, George _965951 |
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| 245 | 1 | 0 | _aObserva e investiga en la ciudad |
| 250 | _a1a. ed. | ||
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_aBuenos Aires : _bKapelusz, _c1971. |
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_a157 p. : _bil. ; _c20 centímetro |
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| 490 | 0 | _aClub de Ciencias | |
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_aCIENCIA-ENSEÑANZA (NIVEL ELEMENTAL) _918543 |
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_aCIENCIAS SOCIALES-ENSEÑANZA ELEMENTAL _97574 |
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_aCIENCIA RECREATIVA _965952 |
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_aBendick, Jeanne _eil. _965955 |
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_aStock, Yolanda K. de _etr. _965956 |
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| 942 | _cBK | ||
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_c203044 _d203044 |
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_c76 _dMaría Victoria Somoza _a76 _bMaría Victoria Somoza |
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