TY  - BOOK
AU  - Thier,Herbert D.
TI  - Teaching elementary school science: a laboratory approach
AV  - LB1585 .T5
U1  - 372.3/5 
PY  - 1970///]
CY  - Lexington, Mass.
PB  - Heath
KW  - Science
KW  - Study and teaching (Elementary)
N1  - Includes bibliographies
ER  -