Teaching elementary school mathematics

por Mahaffey, Michael L.
Publicado 1973

Merril mathematics /

por Buffington, Audrey V., Buffington, Audrey V., Graening, Jay, Mahaffey, Michael, Stoeckinger, John H., Garr, Alice R., Halloran, Philip P., O'Neal, Mary A., Vannatta, Glen D.
Publicado 1985