00425nam a2200157 a 450000500170000008200130001710000160003024500320004626000400007830000280011863000120014696400160015899700180017499900170019295200580020920251203092054.0  a500bGUP  aGupta, S.P.  aScience and its methodology  aNew DelhibAjanta Publicationc1978  aviii,105 p.c22 cm.bHB  aScience  bcdefg_  a51052 LIBSC C  c62975d62975  00104070aPUbPUd1999-05-19l0o500 GUPp51052yBK