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Metodología de la investigación by Hernández Sampieri, Roberto | Fernández Collado, Carlos | Baptista Lucio, Pilar. Edition: 2a ed.Material type:  Text Language: Spanish Publication details: México : McGraw-Hill, 2000Availability: Items available for loan: Biblioteca Central UNNECall number: 001.8 H557 ej.1 (1).
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Técnicas de investigación social : teoría y ejercicios by Sierra Bravo, Restituto. Edition: 14a ed.Material type: Text Language: Spanish Publication details: Madrid : Thomson, 2003Availability: Items available for loan: Biblioteca Central UNNECall number: 303 S572 t 14 ej.1 (1).
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Metodología de la investigación by Hernández Sampieri, Roberto | Fernández Collado, Carlos | Baptista Lucio, Pilar. Edition: 3a ed.Material type: Text Language: Spanish Publication details: México : McGraw-Hill, 2003Availability: Items available for loan: Biblioteca Central UNNECall number: 001.8 H557 m ej.1 (1).
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