Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Sannomiya Toshio and Kushibiki Jun-ichi and Chubachi Noriyoshi,Directional point-focus-beam acoustic microscope system,THE JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN,03694232,Acoustical Society of Japan,1995,51,3,211-220,https://cir.nii.ac.jp/crid/1390001206568245504,https://doi.org/10.20697/jasj.51.3_211