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http://tesis.ipn.mx/xmlui/handle/123456789/2451
http://tesis.ipn.mx/xmlui/handle/123456789/4770
http://tesis.ipn.mx/xmlui/handle/123456789/3712
http://tesis.ipn.mx/xmlui/handle/123456789/4581
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http://tesis.ipn.mx/xmlui/handle/123456789/4859
http://tesis.ipn.mx/xmlui/handle/123456789/6114
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http://tesis.ipn.mx/xmlui/handle/123456789/2423
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http://tesis.ipn.mx/xmlui/handle/123456789/2154
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http://tesis.ipn.mx/xmlui/handle/123456789/1956
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http://tesis.ipn.mx/xmlui/handle/123456789/2288
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http://tesis.ipn.mx/xmlui/handle/123456789/21133
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http://tesis.ipn.mx/xmlui/handle/123456789/19871
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http://tesis.ipn.mx/xmlui/handle/123456789/3745
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http://tesis.ipn.mx/xmlui/handle/123456789/19882
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