TY  - BOOK
AU  - Fortner, Rosanne
AU  - Pinnicks, Roger
AU  - Shay, Edwin
TI  - Biological and earth systems science : a program for the future
KW  - BIOLOGIA
KW  - CAMBIO EDUCATIVO
KW  - CIENCIA DE LA TIERRA
KW  - CURRICULUM CIENTIFICO
KW  - CURRICULUM INTEGRAL
N1  - Mayo 1993
ER  -