TY  - BOOK
AU  - Guba, Egon G.
AU  - Lincoln, Yvonna S. 
TI  - Fourth generation evaluation
SN  - 0-8039-3235-9
U1  - 001.4 GUB-; 
PY  - 1989///
CY  - New Delhi
PB  - Sage Publications
KW  - Negotiation
KW  - Evaluation - Methodology
ER  -