29-Mar-65, S.I. Gelfand.
12-Apr-65, S.I. Gelfand.
26-Oct-65, S.I. Gelfand.
27-Mar-67, S.I. Gelfand.
25-Oct-71, S.I. Gelfand.
26-Mar-73, S.I. Gelfand.
9-Apr-73, S.I. Gelfand.
12-Nov-73, S.I. Gelfand.
1-Mar-76, S.I. Gelfand.
3-Oct-77, S.I. Gelfand.
10-Oct-77, S.I. Gelfand.
24-Oct-77, S.I. Gelfand.
13-Feb-77, S.I. Gelfand.
27-Feb-78, S.I. Gelfand.
26-Feb-79, S.I. Gelfand.
17-Nov-80, S.I. Gelfand.
21-Sep-81, S.I. Gelfand.
21-Sep-81, S.I. Gelfand.
23-Nov-81, S.I. Gelfand.