TY  - BOOK
AU  - Martin,David Jerner
TI  - Elementary science methods: a constructive approach 
SN  - 0827371748
PY  - 1997///
CY  - Albany
PB  - Delmar
KW  - Science
KW  - Study and teaching (ELementary)
KW  - United States
KW  - Constructivism (Education)
N1  - Includes bibliographical references and index
ER  -