Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL "Ritter, Paul","Educreation : education for creation, growth and change : the concept, general implications and specific applications to schools of architecture, environmental design or ekistics",,Pergamon Press,1966,"The commonwealth and international library of science, technology, engineering and liberal studies",,,,https://cir.nii.ac.jp/crid/1130000796325338240