TY  - BOOK
AU  - Borgatta,Edgar F
AU  - Jackson,David J
TI  - Aggregate data : analysis and interpretation 
SN  - 0803914296 
U1  - 519.5 22
PY  - 1980///
CY  - Beverly Hills
PB  - Sage Publications
KW  - Social sciences
KW  - Statistical methods
N1  - Includes bibliographies
ER  -