TY  - BOOK
AU  - Silverman,David
TI  - Qualitative research: theory, method and practice 
SN  - 0803976666
PY  - 1997///
CY  - London
PB  - SAGE Publications
KW  - Social sciences
KW  - Methodology
KW  - Statistical methods
N1  - References : p. 252-253
ER  -