@article{oai:nagoya.repo.nii.ac.jp:02001755,
 author = {OCHIAI, Yoshiyuki and YAMASHITA, Tohru},
 issue = {1},
 journal = {Memoirs of the Faculty of Engineering, Nagoya University},
 month = {Sep},
 pages = {66--71},
 title = {On timbre quality : Part I. Introductory consideration},
 volume = {7},
 year = {1955}
}