- The Helonaki website
- The Helonaki Deep Dive Patreon Page. For as little as $2 per month, you can support the podcast.
- Covered Wagon Women, Volume 9 Bison Books
- Kentucky county marriages, Jacob Kirkland to Margaret McGee, 1822 FamilySearch
- U.S. Census records on FamilySearch.org (searchable by name and location)
- History of Monroe and Shelby Counties MO Digital History
- 1810 U.S. Census, Mercer County, KY U.S. Gen Web Archives
- 1820 U.S. Census, Mercer County, KY, Abraham Kirkland FamilySearch
- 1830 U.S. Census, Cooper County, MO, Jacob Kirklin FamilySearch
- 1840 U.S. Census, Monroe County, MO, Jacob Kirkland FamilySearch
- 1850 U.S. Census, Monroe County, MO, Jacob Kirkland and John Kirkland FamilySearch
- 1860 U.S. Census, Monroe County, MO, Margaret Kirkland FamilySearch
- 1860 U.S. Census, Lafayette County, MO, Jacob Kirkland, Jr. FamilySearch
- 1870 U.S. Census, Hood County, TX, Jacob Kirkland, Jr. FamilySearch
- 1870 U.S. Census, Calaveras County, TX, John Kirkland FamilySearch
- 1870 U.S. Census, St. Clair County, MO, Abraham Kirkland FamilySearch
- 1880 U.S. Census, Monroe County, MO, Abraham Kirkland FamilySearch
- 1900 U.S. Census, Cherokee Nation, Indian Territory, Abraham Kirkland FamilySearch
- 1910 U.S. Census, Vernon County, MO, Abraham Kirkland FamilySearch
- California Great Registers, Calaveras County, John Kirkland FamilySearch
- Land Records Missouri Digital Heritage
- Jacob Kirkland in Missouri BLM GLO land patents
- The Expansion of Daily Life, 1860-1876 by Donald Sutherland WorldCat