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109498 |
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20250704193753.0 |
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|a Organización de las Naciones Unidas para la educación, la ciencia y la cultura (UNESCO)
|9 5107
|
| 245 |
1 |
0 |
|a Vacaciones en el extranjero. Cursos y viajes de estudio. Campos internacionales de trabajo voluntario
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| 260 |
|
|
|a Genève :
|b UNESCO,
|c 1970.
|
| 300 |
|
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|a 6 v. ;
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| 500 |
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|a Portada y texto en inglés, francés y español
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| 942 |
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