"Archived copy". www.dupontregistry.com. Archived from the original on 6 April 2019. Retrieved 15 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)
web.archive.org
"Archived copy". www.dupontregistry.com. Archived from the original on 6 April 2019. Retrieved 15 January 2022.{{cite web}}: CS1 maint: archived copy as title (link)