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| Obtención ... | 64 |
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| tesisdoctortizbarcenas.pdf | 22323 |
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| China | 21 |
| Cuba | 8 |
| Francia | 7 |
| México | 7 |
| Colombia | 5 |
| Alemania | 2 |
| Argentina | 1 |
| Brasil | 1 |
| Finlandia | 1 |
| Perú | 1 |
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| Beijing | 4 |
| Bogotá | 4 |
| Guangzhou | 4 |
| Oaxaca City | 3 |
| Fuzhou | 2 |
| Ningbo | 2 |
| Putian | 2 |
| Tianjin | 2 |
| Changsha | 1 |
| Duitama | 1 |