TY  - BOOK
AU  - Campbell,Donald T
AU  - Stanley,Julian C.
TI  -  Experimental and quasi-experimental designs for research 
U1  - 001.424 COM 
PY  - 1963///.
CY  - Chicago : 
PB  - Rand Menally College Publishing Company, 
KW  - Research, experimental designs
KW  - Research, Quari-experimental designs
KW  - Experimental design
N1  - Includes index.
ER  -