TY  - BOOK
AU  - Creswell,John W.
TI  - Research design: qualitative & quantitative approaches 
SN  - 0803952546
U1  - 300.721 23
PY  - 1994///
CY  - London
PB  - Sage Publications
KW  - Social sciences
KW  - Research methodology
N1  - Includes bibliographical references (p. 209-216) and indexes
ER  -