TY - BOOK AU - Boruch,Robert F. TI - Randomized experiments for planning and evaluation : a practical guide T2 - Applied social research methods series SN - 0803935099 : U1 - 300.724 PY - 1997/// CY - Thousand Oaks PB - Sage Publications KW - Evaluation research KW - Social sciences; Ethics; Law; Population N2 - Social Science ER -