Gay, L. R. Educational research : competencies for analysis and application / L.R. Gay, Peter Airasian. - 6th ed. - Upper Saddle River, N.J. : Merrill, c2000. - xxv, 661 p. : ill. ; 27 cm. Includes bibliographical references and indexes. ISBN: 9780130961037 LCCN: 99021766 Subjects--Topical Terms: Education--Research. LC Class. No.: LB1028 / .G25 2000 Dewey Class. No.: 370/.7/2