"Archived copy"(PDF). Archived(PDF) from the original on October 25, 2021. Retrieved October 25, 2021.{{cite web}}: CS1 maint: archived copy as title (link)
"Archived copy"(PDF). Archived(PDF) from the original on October 25, 2021. Retrieved October 25, 2021.{{cite web}}: CS1 maint: archived copy as title (link)
Ackerman, Carl W. (2000) [1930]. George Eastman : Founder of Kodak and the photography business. Washington, D.C.: BeardBooks. p. 466. ISBN1-893122-99-9. OCLC58845378.