Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Adachi Akira and Morita Zen-ichiro,THE DISTORTION OF BALL BEARING STEEL AFTER VARIOUS HEAT-TREATMENTS,Tetsu-to-Hagane,00211575,The Iron and Steel Institute of Japan,1956,42,1,34-39,https://cir.nii.ac.jp/crid/1390001205128301440,https://doi.org/10.2355/tetsutohagane1955.42.1_34