00355nam a2200133 a 450000500170000002000150001708200160003210000260004824500490007426000250012330000230014863000300017163000200020120251203091530.0  a817000022X  a025.52bSHA  aSharma, Jagdish Saran  aReference service and sources of information  aDelhibEss Essc1987  aviii,288p.c22 cm.  aLibrary Reference service  aLibrary Science