Charles Edward Weller , The early history of the typewriter (1918)ETCetra誌版

http://www26.atwiki.jp/raycy/pages/246.html

http://www.archive.org/details/earlyhistorytyp00wellgoog

http://kygaku.g.hatena.ne.jp/raycy/20100620/1277024401
http://web.archive.org/web/*/http://home.earthlink.net/~ajrehr/archive.html
Charles Edward Weller , The early history of the typewriter (1918)

The early history of the typewriter	連載	ETCetra号数
Weller: History of the TW,	I	9	http://web.archive.org/web/20060417194023/http://staff.xu.edu/%7Epolt/etc/ETC.09.pdf
Weller	II	10	http://web.archive.org/web/20060417194023/http://staff.xu.edu/%7Epolt/etc/ETC.10.pdf
Weller	III	11	http://web.archive.org/web/20060417194023/http://staff.xu.edu/%7Epolt/etc/ETC.11.pdf
Weller	IV	12	http://web.archive.org/web/20060417194023/http://staff.xu.edu/%7Epolt/etc/ETC.12.pdf
Weller	V	13	http://web.archive.org/web/20060417194023/http://staff.xu.edu/%7Epolt/etc/ETC.13.pdf
Weller	VI	14	http://web.archive.org/web/20060417194023/http://staff.xu.edu/%7Epolt/etc/ETC.14.pdf

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