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http://tesis.ipn.mx/xmlui/handle/123456789/912
http://tesis.ipn.mx/xmlui/handle/123456789/29602
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http://tesis.ipn.mx/xmlui/handle/123456789/8615
http://tesis.ipn.mx/xmlui/handle/123456789/29566
http://tesis.ipn.mx/xmlui/handle/123456789/1768
http://tesis.ipn.mx/xmlui/handle/123456789/24697
http://tesis.ipn.mx/xmlui/handle/123456789/10366
http://tesis.ipn.mx/xmlui/handle/123456789/878
http://tesis.ipn.mx/xmlui/handle/123456789/10616
http://tesis.ipn.mx/xmlui/handle/123456789/9725
http://tesis.ipn.mx/xmlui/handle/123456789/9547
http://tesis.ipn.mx/xmlui/handle/123456789/29603
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http://tesis.ipn.mx/xmlui/handle/123456789/3417
http://tesis.ipn.mx/xmlui/handle/123456789/29728
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http://tesis.ipn.mx/xmlui/handle/123456789/9409
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http://tesis.ipn.mx/xmlui/handle/123456789/24934
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http://tesis.ipn.mx/xmlui/handle/123456789/1104
http://tesis.ipn.mx/xmlui/handle/123456789/1089