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==External references==
* [http://www.esterbrook.net/] A site dedicated to the company, a mine of information.
* [https://web.archive.org/web/20171216155147/http://www.rickconner.net:80/penspotters/esterbrook.html] An article about the company.
* [http://www.penhero.com/PenGallery/Esterbrook/EsterbrookAds.htm] An advertising gallery.
* [http://www.richardspens.com/ref/profiles/j.htm] An article on [[Esterbrook J|J model]].
* [http://www.richardspens.com/ref/profiles/dollar.htm] An article on [[Dollar Pen]].
* [https://web.archive.org/web/20171216155147/http://www.rickconner.net:80/penspotters/esterbrook.html] An article about the company.
* [http://www.vintagepens.com/Esterbrook.shtml] Brand page on David Nishimura website.
* [https://web.archive.org/web/20141111173638/http://www.billspens.com:80/billspens/esterbrook/esterbrook.htm] Brand page on Bill Acker website.
* [http://hans.presto.tripod.com/nibs/esterbrook02.html] An article on the company's history.
* [http://web.archive.org/web/20080819205512/http://www.zianet.com/jmcdgwin/ebrook.htm] An article on the company's history.
* [http://web.archive.org/web/20120313091441/http://www.kamakurapens.com/Archive/EsterbrookPens.html] An article on the company's history.
* [http://www.snyderfamily.com/current/estienibs.htm] An article on nibs numbers.
==Notes==
==Notes==
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