TY  - BOOK
AU  - Schlesselman James J
TI  - Case-control studies: design, conduct, analysis
SN  - 978-0-19-502933-8
U1  - 000SB:614.4 
PY  - 1982///
CY  - New York
PB  - OUP
KW  - Epidemiology-statistical methods
KW  - Experimental design
ER  -