Autorités BnF, data.bnf.fr, besøkt 10. oktober 2015[Hentet fra Wikidata]
britannica.com
Encyclopædia Britannica Online, Encyclopædia Britannica Online-ID biography/John-Tyler, besøkt 9. oktober 2017[Hentet fra Wikidata]
Encyclopædia Britannica Online, Encyclopædia Britannica Online-ID biography/John-Tyler[Hentet fra Wikidata]
cbsnews.com
«How two of President John Tyler's grandsons are still alive, 174 years later». www.cbsnews.com(engelsk). 6. mars 2018. Besøkt 12. februar 2021. «He had eight children with his first wife, who died while he was in office. At 52, he married 22-year-old Julia Gardiner. They had seven children, for a total of 15 -- the most of any president. He was 63 when son Lyon Tyler was born, whose first wife also died. Lyon also had a very young second wife, and was 75 years old when Harrison Tyler was born in 1928.»
«President John Tyler’s Grandson, Harrison Tyler, on Still Being Alive». Intelligencer(engelsk). 27. januar 2012. Besøkt 12. februar 2021. «“Thank goodness,” says Harrison Ruffin Tyler, one of those grandsons, who spoke to us earlier this morning from Sherwood Forest Plantation, the historical Tyler family home in Virginia in which he resides. Harrison Tyler is not an immortal vampire, or a 160-year-old freak of nature, but a mentally sharp octogenarian with a soothing Southern drawl and a more favorable opinion of his grandfather’s legacy than the ones held by most presidential historians.»
nytimes.com
McFadden, Robert D. (7. oktober 2020). «Lyon Gardiner Tyler Jr., Grandson of the 10th President, Dies at 95». The New York Times(engelsk). ISSN0362-4331. Besøkt 12. februar 2021. «He and his brother, grandsons of John Tyler, were the third of three generations that remarkably spanned almost the entire history of the American experience.»
usatoday.com
Miller, Ryan W. «A grandson of 10th US president John Tyler, who took office in 1841, has died at 95». USA TODAY(engelsk). Besøkt 12. februar 2021. «A grandson of 10th U.S. president John Tyler, who left office 175 years ago, died at age 95 last month, a historical anomaly of a family whose three generations span three centuries from the nascent United States to 2020.»
«Tyler Family Papers, Group A». Special Collections Research Center, Earl Gregg Swem Library, College of William and Mary. Arkivert fra originalen 28. juli 2011. Besøkt 22. januar 2011.
The Peerage person ID p32308.htm#i323075, besøkt 7. august 2020[Hentet fra Wikidata]
wm.edu
scrc.swem.wm.edu
«Tyler Family Papers, Group A». Special Collections Research Center, Earl Gregg Swem Library, College of William and Mary. Arkivert fra originalen 28. juli 2011. Besøkt 22. januar 2011.
worldcat.org
McFadden, Robert D. (7. oktober 2020). «Lyon Gardiner Tyler Jr., Grandson of the 10th President, Dies at 95». The New York Times(engelsk). ISSN0362-4331. Besøkt 12. februar 2021. «He and his brother, grandsons of John Tyler, were the third of three generations that remarkably spanned almost the entire history of the American experience.»
