00297nam a2200109 a 450000500170000002000150001708200160003210000190004824500520006726000460011930000220016520251203110044.0  a8171005012  a300.72bGUP  aGupta, Santosh  aResearch methodology and statistical techniques  aNew DelhibDeep & Deep Publicationsc1997  axii,510p.c23 cm.