4th International Conference «Modern Problems of Genetics, Radiobiology, Radioecology and Evolution» dedicated to N.W.Timofeeff-Ressovsky and his Scientific School Conferences Twitter Вконтакте 4th International Conference «Modern Problems of Genetics, Radiobiology, Radioecology and Evolution» dedicated to N.W.Timofeeff-Ressovsky and his Scientific School 2-6 June. St. Petersburg, Russia