Morgan, George A. Easy use and interpretation of SPSS for Windows : answering research questions with statistics / George A. Morgan, Orlando V. Griego - Mahwah, N.J : Lawrence Erlbaum Associates, 1998 - iv, 276 p. ; 28 cm. ISBN: 0805829598 Subjects--Topical Terms: Social sciences Dewey Class. No.: 519.507855369 / E139