Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) TODORIKI Ryo,Small-sized Engineering Applied on Cassette Tape-recorder,Journal of the Society of Mechanical Engineers,00214728,The Japan Society of Mechanical Engineers,1980,83,738,511-516,https://cir.nii.ac.jp/crid/1390282680901161344,https://doi.org/10.1299/jsmemag.83.738_511