00345nam a2200157Ia 45000010006000000050017000060080041000230410008000640820015000721000034000872450034001212600009001553000007001646500008001716540008001791317520260306163034.0260306t1992||||xx |||||||||||||| ||spa||  aESP  a001.4bZ86  aZorrilla Arena, SantiagoeAUT 0aGuía para elaborar la tesis  c1992  ac  aGEN  aCHU