TY  - BOOK
AU  - Ary, Donald;Jacobs, Lucy Cheser;Razavieh, Asghar.
TI  - Introduction to research in education
SN  - 0030324629
U1  - 001.42 ARYD 
PY  - 1990///
CY  - London
PB  - Holt, Rinehart and winston Inc
KW  - Research Methodology
ER  -