Cook, Thomas D.
Quasi-experimentation : design & analysis issues for field settings - Boston, Mass. : , 1979 - 405
SOCIAL SCIENCES
RESEARCH DESIGN
SOCIAL SCIENCES--RESEARCH
SOCIAL SCIENCES--FIELD WORK
H62 / C664Q
Quasi-experimentation : design & analysis issues for field settings - Boston, Mass. : , 1979 - 405
SOCIAL SCIENCES
RESEARCH DESIGN
SOCIAL SCIENCES--RESEARCH
SOCIAL SCIENCES--FIELD WORK
H62 / C664Q