TY  - GEN
AU  - Yin , Robert K.
TI  - Case study research: design and methods
SN  - 076192552x
U1  - 300.722 
PY  - 2003///
CY  - California
PB  - Sage Publications
KW  - SOCIAL SCIENCES RESEARCH METHODS
KW  - SOCIAL SCIENCES
ER  -