TY  - GEN
AU  - Norusis M J
TI  - SPSS for Windows : : base system user’s guide, release 6.0 
SN  - 0131788566
AV  - HA32 
PY  - 1993///
CY  - Chicago : 
PB  - SPSS Inc., 
KW  - Social sciences
KW  - Statistical methods
KW  - Computer programs
N1  - Includes bibliographical references (p. 791-794) and index
ER  -