TY  - GEN
AU  - Shadish, William R.
AU  - Cook, Thomas D.
AU  - Campbell, Donald T.
TI  - Experimental and quasi-experimental designs for generalised causal inference
AV  - BD591 Sha
PY  - 2002///
PB  - Wadsworth Cengage Learning
KW  - Causation - Experiments
N1  - 19456
ER  -