- [S15] Obituary, Emma Jane Firmenich, April 29, 1941 - Unknown Paper.
- [S174] 1900 US Census, Town of Sanborn, Ashland Co., Wisconsin; 15; p. 3B; h.49 f.50; Edna G Firmenich; 9 June 2010.
- [S190] 1905 Wisconsin State Census, Edna Firmenich; Sanborn, Ashland Co., Wisconsin, pg. 488.
- [S181] 1910 US Census, Town of White River, Ashland Co., Wisconsin; 18; p. 5B; h.72 f.74; Edna G Firmenich; 9 June 2010.
- [S2] Corrigan Family Memories.
- [S234] Ancestry.com Family Tree, 18 July 2010; Edna Gertrude Firmenich; Kathleen; http://trees.ancestry.com/tree/12063066/person/-342501763.