TY  - BOOK
AU  - Blough,Glenn Orlando
TI  - Elementary-school science and how to teach it
AV  - Q181 .B558
U1  - 372.35 
PY  - 1951///]
CY  - New York
PB  - Dryden Press
KW  - Science
KW  - Study and teaching
KW  - Local
ER  -