TY  - BOOK
AU  - Johnson,Simon S.
TI  - Update on education: a digest of the National Assessment of Educational Progress 
AV  - LA217 J6.9
PY  - 1975///
CY  - Denver, E.U.A.
PB  - National Assessment of Educational Progress
KW  - EDUCACION -
KW  - ESTADISTICA -
KW  - ESTADOS UNIDOS
KW  - MEDICIONES Y PRUEBAS EDUCATIVAS -
ER  -