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:Especialización en Desarrollo Humano con Énfasis en Procesos Afectivos y Creatividad, 17 años de memorias / Specialization in Human Development with Emphasis on Affective Processes and Creativity, 17 years of memories.
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