TY  - BOOK
AU  - Grinnell, Richard M..
TI  - Social work research and evaluation: foundations of evidence-based practice / 
SN  - 978-0-19-530152-6
U1  - YZ:f 
PY  - 2008///
CY  - New York : 
PB  - Oxford University Press , 
KW  - Social service- Research
ER  -