00525nam a2200133Ia 4500008004100000040001700041082002400058100001800082245006300100260004000163300001000203440006400213650011400277190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta025.52bS964C  aSuseela Kumar 4aThe Changing concepts of reference servicec Suseela Kumar  aDelhibVikas Publishing Housec1974  a327p.  aSarada Ranganathan Endownment for Library science series; 7  aReference services (Libraries)-Addresses, essays, lectures, etc.; Reference services (Libraries)-Case studies