TY  - BOOK
AU  - Silverman, David
TI  - Interpreting qualitative data : a guide to the principles of qualitative research 
SN  - 978 0 85702 421 3
U1  - 300 72 SIL 
PY  - 2011///
CY  - London 
PB  -  SAGE
KW  - QUALITATIVE RESEARCH
ER  -