Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Saito tamako and Saito sachiko and Iida takeo and Ito noriyuki,A Study on the volume of solid bodies (III) : IN CASE OF SPHERE AND CONCAVE,Bulletin of Japanese Society for the Science of Design,0910-8173,Japanese Society for the Science of Design,1979,1979,30,138-139,https://cir.nii.ac.jp/crid/1390001205411563520,https://doi.org/10.11247/jssdj.1979.138