TY  - BOOK
AU  - Risk,Thomas M.
TI  - Principles and practices of teaching in secondary schools 
U1  - 373.11 
PY  - 1965///.
CY  - New Delhi : 
PB  - Eurasia Publishing House (Pvt.) Ltd., 
KW  - Education--Experimental methods
KW  - Education, Secondary
KW  - Educational psychology
N1  - Includes index.
ER  -