TY  - BOOK
AU  - Gall, Meredith D
TI  - Educational research:  an introduction 
SN  - 9780801303340
AV  - LB 1028 .B67 1989 
PY  - 1989///
CY  - NewYork
PB  -  Longman
KW  - Education-Research-Methodology
ER  -