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| UNION PAPELERA DE MEXICO, S.A. DE C.V. (UPM) | |
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Av. San Francisco No. 645 Col. Del Valle 03100, México Distrito Federal, México | Tel: (55) 5682-8265, 5543-4465 al 67 Fax: (55) 5523-6184 | |
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| COMERCIAL MAPASA, S.A. DE C.V. | |
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Cañito No. 39 Col. Tacuba 11410, México Distrito Federal, México | Tel: Tel: (55) 5527-4394, 5399-6088 Fax: (55) 5527-8704 | |
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