Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 村上 勇次郎,整備効率について,The Journal of the Japan Society of Aeronautical Engineering,00214663,THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES,1962,10,96,23-27,https://cir.nii.ac.jp/crid/1390001205369316864,https://doi.org/10.2322/jjsass1953.10.23