TY  - BOOK
AU  - Shadish,William R.
AU  - Campbell,Donald T.
AU  - Cook,Thomas D.
TI  - Experimental and quasi-experimental designs for generalized causal inference
SN  - 0395615569
AV  - QA 279 S524e
PY  - 2002///
CY  - Boston: 
PB  - Houghton Miffin, 
KW  - Experimental design
ER  -