TY  - BOOK
AU  - SHADISH, WILLIAM  R
ED  - WADSWORTH CENGAGE LEARNING
TI  - EXPERIMENTAL AND QUASI-EXPERIMENTAL DESIGNS FOR GENERALIZED CAUSAL INFERENCE
SN  - 978395615560
U1  - 001.42 
CY  - BELMONT
KW  - CONCLUSIONES
KW  - IMPLEMENTACION
KW  - INVESTIGACIONES
ER  -