Home › Authors › Bruno Maennel 👤 Bruno Maennel 6 books Books by Bruno Maennel Auxiliary Education - the Trai Auxiliary Education - the Training of Backward Children 2010 Auxiliary education 1909 The auxiliary schools of Germa The auxiliary schools of Germany 1907 The auxiliary schools of Germany, six lectures 1907 Vom hilfsschulwesen Vom hilfsschulwesen 1905 Über Abstraktion Über Abstraktion 1890
