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121108s1958 pan ||||g| | 00| ||spa d |
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|a 110257
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|a Sistema de Bibliotecas de la Universidad de Panama
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|a T 372.33
|b V71
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|a Villarreal E., César A.
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| 245 |
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|a Nueva orientación en la enseñanza de las ciencias en la escuela primaria pública panameña /
|c César A., Villarreal E. --
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| 260 |
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|a Panamá :
|b Universidad,
|c 1958.
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| 300 |
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|a ii, 68 p. ;
|c 28 cm.
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| 650 |
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|a CIENCIAS-
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