TY  - BOOK
AU  - Edwards,Clifford H.
AU  - Fisher,Robert L.
TI  - Teaching elementary school science: a competency-based approach
PY  - 1977///
CY  - New York
PB  - Praeger
KW  - Science
KW  - Study and teaching (Elementary)
KW  - Local
N1  - Includes bibliographical references and index
ER  -