Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) NAKAYAMA Hidetaro,Historical Change of Design Concepts and Evolution of Machines(Special Issue on the Design Principle),Journal of the Society of Mechanical Engineers,00214728,The Japan Society of Mechanical Engineers,1981,84,749,322-327,https://cir.nii.ac.jp/crid/1390282680901752576,https://doi.org/10.1299/jsmemag.84.749_322