Title:A geometria nas aritméticas editadas para as escolas paroquiais luteranas do século xx no rio grande do sul, brasil / THE GEOMETRY ON ARITHMETICS EDITED FOR LUTHERAN PAROCHIAL SCHOOLS OF 20th CENTURY IN RIO GRANDE DO SUL, BRAZIL
Title:Tecnologías de la información y la comunicación como herramienta para enseñar matemáticas / Information and communication technologies as a tool to teach mathematics