TY  - BOOK
AU  - Nelson,Pearl Astrid
TI  - Elementary school science activities
PY  - 1968///]
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Science
KW  - Study and teaching (Elementary)
KW  - Local
N1  - Bibliography: p. 199-202
ER  -