TY  - BOOK
AU  - Yin, Robert K.
TI  - Case study research 
SN  - 080393470X :;0803934718 (pbk.) :
U1  - 300.722 
PY  - 1989///
CY  - Newbury Park, [Calif.] 
PB  - Sage Publications
KW  - Case method.;Social sciences
ER  -