#736377Optical devices used in schools for visually impaired children. Research Institute of the USSR APN Defectology in Sverdlovsk (now Yekaterinburg).Sign in or register,to downloadAdd to cartRemove from cartCategories: Education, HealthLocation: Yekaterinburg, RussiaEvent date: 01.04.1972Date published: 06.08.2010Author: M. NachinkinCredit: SputnikSource: SputnikOriginal: J72-3612, 35 mm filmMedia: JPEG, 5012x3543px, 3.4Mb