TY  - BOOK
AU  - Neuman,W Laerence  .
TI  - Social resaerch methods: qualitative and quantitative approaches / 
SN  - 0-205-31516-x
U1  - 301.072 
PY  - 1999///
CY  - Boston : 
PB  - Allyn and Bacon , 
KW  - Research methods
ER  -