TY  - BOOK
AU  - Ryburn,W.M.
TI  - The principles of teaching 
U1  - 371.3 RYB 
PY  - 1944///.
CY  - London : 
PB  - Oxfore University Press, 
KW  - Education-methods of teaching
KW  - Education-teaching
N1  - Includes index.
ER  -