@article{oai:toyo-bunko.repo.nii.ac.jp:00003407,
 author = {YAMAZAKI, Yoemon and YAMAZAKI, Yoemon},
 journal = {Memoirs of the Research Department of the Toyo Bunko (The Oriental Library)},
 month = {},
 pages = {91--140},
 title = {The Origin of the Chinese Abacus},
 volume = {18},
 year = {1959}
}