00501nam a2200157Ia 4500008004100000020005500041040000800096082001700104100002900121245003200150260000900182264001600191942001300207952010600220999001700326231129s1993||||xx |||||||||||||| ||spa||  a970-10-0139-7                                       bspa  a378.242 Z89g  aZorrilla Arena  Santiago 0aGuia para elaborar la tesis  c1993  aMcGraw-Hill  2ddccBKS  00102ddc4070aBRCbBRCd2009-07-09l0o378.242 Z89gp11154r2023-11-29 21:14:28t1w2023-11-29yBK  c14785d14785