Matemáticas para la escuela primaria : grado 6 - School Mathematics Study Group (Ann Arbor, Michigan : Mich Board of Trustees of the Leland Stanford Junior University, 1966)
Comentario: Ann Arbor, Mich? Board of Trustess of Leland Stanford Junior University, 1966. 2 v. ilus.
Keywords: ARITMETICA; GEOMETRIA; ALGEBRA