TY  - BOOK
AU  - Sheckles,Mary
TI  - Building children's science concepts: experiences with rocks, soil, air and water
T2  - Practical suggestions for teaching, no. 15
AV  - Q181 .S42
U1  - 372.35 
PY  - 1958///
CY  - New York
PB  - Bureau of Publications, Teachers College, Columbia
KW  - Science
KW  - Study and teaching
KW  - Local
N1  - Bibliography: p.137
ER  -