Title of article :
Maximizing both external and internal validity in longitudinal true experiments with voluntary treatments: The “combined modified” design
Author/Authors :
Sanford L. Braver، نويسنده , , Melanie C. Smith، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1996
Journal title :
Evaluation and Program Planning
Journal title :
Evaluation and Program Planning