Report on the insane, feeble-minded, deaf and dumb, and blind in the United States at the eleventh census, 1890 図書 Billings, John Shaw・United States. Census Office ·1895 ·Government Printing Office cir.nii.ac.jp
Japanese Onomatopes and the Origin of Language 論文 W. G. Aston ·1894-01-01 ·『The Journal of the Anthropological Institute of Great Britain and Ireland』 23 pp. 332-332 doi:10.2307/2842085