TY  - BOOK
AU  - Roos,Leslie L
AU  - Caporaso,James A
TI  - Quasi-experimental approaches: testing theory and evaluating policy
SN  - 0810104199 
AV  - H62 .C3382
U1  - 300.72 22
PY  - 1973///
CY  - Evanston
PB  - Northwestern University Press
KW  - Social sciences
KW  - Research
KW  - Experimental design
KW  - Methodology
N1  - Bibliography: p. [333]-361
ER  -