TY  - BOOK
AU  - Peterson,Penelope L.
AU  - Walberg,Herbert J.
TI  - Research on teaching : : Concepts, findings, and implications / 
SN  - 0821115189 (pb)
PY  - 1979///
CY  - California : 
PB  - McCutchan Publishing Corporation, 
N1  - Includes index
ER  -