TY  - BOOK
AU  - Hirschi, Travis and Salvin, Hanan C.
AU  - Salvin, Hanan C. ; jt. auth.
TI  - Principles of survey analysis
U1  - 301.0723 
PY  - 1973///
CY  - New York
PB  - Free Press
N1  - Formerly titled 'Delinquency Research'
ER  -