Sehgal, R L Designing and evaluation of research in library science: v 2 - 1st - New Delhi Ess Ess 1998 - 8,363p p. ISBN: 81-7000-229-x Subjects--Index Terms: Library Science - Research LC Class. No.: 2:b4 / N8.2 Dewey Class. No.: 020.72 / SEG.R.2