TY  - BOOK
AU  - Pawson Ray
AU  -  Tilley Nick
TI  - Realistic evalution
SN  - 0761950087 (hbk)
U1  - E:(:f), N7 
PY  - 1997///
CY  - London
PB  - Sage Pub      
KW  - RESEARCH METHODS; CHEMISTRY
ER  -