#581661Young mathematicians.Sign in or register,to downloadAdd to cartRemove from cartCategories: EducationLocation: Moscow, RussiaEvent date: 01.09.1973Date published: 22.02.2010Author: L. NosovCredit: SputnikSource: SputnikOriginal: D73-1715, 6x6 slideMedia: JPEG, 3544x3544px, 3.2Mbeducationschool curriculumstudentsstudies