TY  - BOOK
AU  - De Vaus David A.
TI  - Research design in social research
SN  - 076153477
U1  - Sigma:f, P4 
PY  - 2004///
CY  - London
PB  - Sage Publications U. K.     
KW  -  SOCIAL SCIENCES
KW  - RESEARCH METHODS
ER  -