TY  - BOOK
AU  - Trochim William M K
TI  - Research design for program evaluation :  the regression discontinuity approach
T2  - Contemporary Evaluation Research : A series of books on applied social science
U1  - Sigma:f, M4 
PY  - 1984///
CY  - New Delhi
PB  - Sage Publications India     
KW  -  RESEARCH METHODS
KW  - SOCIAL SCIENCES
ER  -