TY  - BOOK
AU  - Thut, I. N.,
AU  - Gerberich, Joseph Raymond,
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 2
PY  - 1949///46
CY  - New York
PB  - McGraw-Hill
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Teaching.;Education, Secondary
N1  - Visual aids: p. 477-478; Includes Selected references; 5
ER  -