TY  - BOOK
AU  - Blough,Glenn O.
AU  - Huggett,Albert J.
AU  - Schwartz,Julius
TI  - Elementary school science and how to teach it 
U1  - 372.35 
PY  - 1958///.
CY  - New York : 
PB  - Holt, Rinehart and Winston, Inc., 
KW  - Science--Study and teaching (Elementary)
KW  - Science--Study and teaching
N1  - Includes index.
ER  -