O.N.Trapeznikova (wife of L.V.Shubnikov-the second at the left in the first line) and M.L.Shubnikov (son of L.V.Shubnikov - the third at the left in the first line) among collaborators of the  ILTPE (the third at the right  in  first  line- B.I.Verkin - director ILTPE  from 1960г. to 1988г., the third at the left in the second line - V.V. Eremenko - director ILTPE at the present time ) during celebrating a 25-anniversary of institute (1985).