TY  - BOOK
ED  - SPSS Inc.
TI  - SPSS 6.1 base system user's guide: UNIX version
SN  - 0134595610
PY  - 1995///
CY  - Chicago, Ill.
PB  - SPSS Inc.
KW  - SPSS (Computer program)
KW  - Social sciences
KW  - Statistical methods
KW  - Computer programs
ER  -