Dr. Ivan Yefremov, professor and sci fi writer.

01.01.1964#97424

Prof. Ivan Yefremov, Ph.D.(Biology), writer.

01.01.1963#87986

Ivan Yefremov, writer and professor of paleontology.

01.03.1957#86411

Soviet writer Ivan Yefremov (1907-1972).

01.06.1968#69127

Professor of paleonthology and science-fiction writer Ivan Yefremov examines dinosaur skull, which was found in Mongolia.

26.01.1957#57556