TY  - GEN
AU  - Wright,Grace Stevens
TI  - Block-time classes and the core program in the junior high school
U1  - 373.23 21
PY  - 1958///
CY  - Washington
PB  - U.S. Government printing office
KW  - ESCUELAS SECUNDARIAS
KW  - PLANES DE ESTUDIO
KW  - LEMB
KW  - EDUCACIÓN
KW  - MÉTODOS EXPERIEMENTALES
ER  -