00362nam a2200157Ia 45000010006000000050017000060080041000230410008000640820021000721000039000932450040001322600009001723000007001816500008001886540008001961326220260306163041.0260306t2010||||xx |||||||||||||| ||spa||  aESP  a001.42bH45 2010  aHernández Sampieri, RobertoeAUT 0aMetodología de la investigación  c2010  ac  aGEN  aCHU