TY  - GEN
AU  - Hurd Paul DeHart
TI  - New directions in teaching secondary school science
T2  - Rand McNally education series
SN  - 69017209 
AV  - Q181  
U1  - 607/.1/2 
PY  - 1969///
CY  - Chicago
PB  - Rand McNally
KW  - Science
KW  - Study and teaching Secondary
ER  -