Las Matematicas: Lenguaje Universal. Nivel 2a: Suma y Resta de Numeros Enteros (Mathematics: A Universal Language. Level 2a: Addition and Subtraction of Whole Numbers)
Fort Worth Independent School District, TX. Bilingual Education Program ; Dissemination and Assessment Center for Bilingual Education, Austin, TX
Dissemination and Assessment Center for Bilingual Education 1979
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