Kothari, C. R. Research methodology : methods and techniques / C. R. Kothari - 2nd ed. - New Delhi : Wiley Eastern Ltd., c1990. - xii, 468 p. : ill., figs., tabs. ; 22 cm. Includes index ISBN: 0852264771 Subjects--Topical Terms: Research --Methodology LC Class. No.: Q180.55 / .K68 1985 Dewey Class. No.: 001.42 / K87r