00521nam a2200145 a 450000500170000010000060001724500910002326000810011430000240019569000600021996400160027999700110029599900190030695200500032520251203115209.0  d_  aAryabhatta Research Institute of Observational SciencesbFifty golden years (1954-004)  aNainital (UP)bAryabhatta Research Institute of Observational Sciencesc2005  aviii, 82p.c25cm HB  aAryabhatta Research Institute of Observational Sciences  bcdefg_  aR297 R  c207399d207399  00104071aPUbPUd2006-10-20l0o pR297yR