TY  - BOOK
AU  - Black,Thomas R.
TI  - Evaluating social science research : an introduction / 
SN  - 0803988524
U1  - 300.7 
PY  - 1993///
CY  - London : 
PB  - Sage Publications , 
KW  - SOCIAL SCIENCE-METHODOLOGY
N1  - NULL
ER  -