TY  - BOOK
AU  - Navarra,John Gabriel
AU  - Zafforoni,Joseph
TI  - La enseÃ±anza de las ciencias naturales
SN  - 9682601487
PY  - 1980///
CY  - MÃ©xico
PB  - CompaÃ±Ã­a Editorial Continental
KW  - Science
KW  - Study and teaching (Elementary)
KW  - Local
N1  - Includes bibliographies and index
ER  -