TY  - BOOK
ED  - SPSS Inc.
TI  - SPSS base 12.0 user's guide
SN  - 0131096761
PY  - 2003///
CY  - Chicago
PB  - SPSS Inc.
KW  - SPSS for Windows
KW  - Social sciences
KW  - Statistical methods
KW  - Computer programs
ER  -