TY  - BOOK
AU  - Shadish,William R.
AU  - Cook,Thomas D.
AU  - Campbell,Donald Thomas
TI  - Experimental and quasi-experimental designs for generalized causal inference
SN  - 0395615569
U1  - 122.072 21
PY  - 2002///
CY  - Boston
PB  - Houghton Mifflin
KW  - Causation
KW  - Experiments
N1  - Includes bibliographical references (p. 514-591) and indexes
UR  - http://repository.fue.edu.eg/xmlui/handle/123456789/3345
ER  -