TY  - BOOK
AU  - Morgan, Stephen L
AU  - Winship, C
TI  - Counterfactuals and causal inference: methods and principles for social research
SN  - 9780521671934
U1  - 311.2 
PY  - 2007///
CY  - Cambridge
PB  - Cambridge
KW  - CAUSATION
KW  - SOCIAL SCIENCES-METHODOLGY
KW  - SOCIAL SCIENCES-RESEARCH
ER  -