Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) YAMASHITA Masao,Present and Future of Ships,Journal of the Society of Mechanical Engineers,00214728,The Japan Society of Mechanical Engineers,1960,63,492,148-155,https://cir.nii.ac.jp/crid/1390001205915601280,https://doi.org/10.1299/jsmemag.63.492_148