Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
Fujiwara Jun-ichi,Advance of echo sounder technology from the genesis to today,THE JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN,03694232,Acoustical Society of Japan,1987,43,9,706-707,https://cir.nii.ac.jp/crid/1390282681544107648,https://doi.org/10.20697/jasj.43.9_706