TY  - BOOK
AU  - Silvey Jonathan
TI  - Deciphering data :  The analysis of social surveys.   
T2  - Aspects of modern sociology : social research. Ed by John Barron Mays and Maurice Craft
U1  - Yb4, L5 
PY  - 1975///
CY  - London
PB  - Longman          
N1  - Bibliography P126-131
ER  -