00294nam a2200133Ia 4500020001800000082002000018100002100038245003000059250000800089260004700097300000600144500000500150700000500155  a9788170005834  a027.7bSa131.AL  aSahai, Shri Nath  aAcademic library systemb  a2nd  aNew DelhibEss Ess Publicationcxvi, 344p.  a   a  a