Letter to “friend” from V.K. Volk about his upcoming trip, 1969-04-04, Box: 1 - Volk, Vladimir Konstantin Dr., Folder: 3 - Correspondence. Public Health and Hospitals, RG-PUBLIC-HEALTH. Hoyt Library Archives. https://archive.saginawlibrary.org/repositories/2/archival_objects/25970 Accessed April 15, 2025.