TY  - GEN
AU  - Yin, Robert k.
TI  - Case Study Reseaerch Design and Methods
SN  - 0803956622
U1  - 300.722 YIN 
PY  - 1994///
CY  - London : New Delhi
PB  - Sage publications
KW  - Case Study Research : design and methods
ER  -