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SPSS 6.1 Base System User's Guide, Part 2
by Marija J. Norusis, SPSS Inc.
ISBN: 9780134388700
List Price: $38.33
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Spss Statistical Software Cd-Rom Version 11. 0 Sekaran, Aaker, Kumar, Mcdaniel
by SPSS Inc. Staff
ISBN: 9780471458951
List Price: $14.95