00305nam a2200109 a 450000500170000002000150001708200210003210000230005324500580007626000360013430000250017020251203110750.0  a141294077X  a300.2855369bWAG  aWagner, William E.  aUsing SPSS for Social Statistics and Research Methods  aLondonbSage Publicationsc2007  aix, 101p.c26 cm. PB