TY  - BOOK
AU  - GERRING John
TI  - Case study research:  Principles and practices   
SN  - 9781316632505
U1  - Yb4y7, Q7 
PY  - 2017///
CY  - United Kingdom 
PB  - Cambridge University Press       
KW  - Sociology
N1  - Bibliography :P351-69
ER  -