TY  - BOOK
AU  - Risk,Thomas M.
TI  - Principles and practices of teaching in secondary schools
AV  - LB1607 .R5 1958
PY  - 1958///]
CY  - New York
PB  - American Book co.
KW  - Education
KW  - Experimental methods
KW  - Education, Secondary
KW  - Educational psychology
ER  -