- Search for your Ancestors, Ancestry Library Edition, 19 March 2006.
- Leibert & Macneil mentioned in Daily Mining Gazette, 5 August 1905, and ad 19 August 1905.
- Polk Directory, 1910. Daily Mining Gazette 16 December 1905.
- Evening Copper Journal, 20 October 1909, and Gundlach Collection, 85V.
- Fourteenth Census of the United States, Ancestry Library Edition, 19 March 2006.
- Search for your Ancestors, Ancestry Library Edition, 19 March 2006.
- Hunts’ Guide to Michigan’s UPPER PENINSULA, 26 February 1997, Hunts-upguide, 15 April 2006.
- Drawings of Ahmeek Mine Office, signed by Paul Humphrey Macneil, 13 April 1908, in Drawer 197 of C&H Drawing Collection, MTU Archives.
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