TY  - BOOK
AU  - Creswell,John W.
TI  - Research design: qualitative & quantitative approaches 
SN  - 9780803952553
AV  - H62.C74 1994 
PY  - 1994///
CY  - Thousand Oaks, Calif.
PB  - Sage Publications
KW  - Social sciences
KW  - Research
KW  - Methodology
KW  - Statistical methods
ER  -