EN
Letter of the Chairman of the Council of the State of the Polish People's Republic Prof. Dr Henryk Jablonski. Memoirs of Fourth International Congress of Parasitology (ICOPA-IV, Warsaw, 19-26 August 1978)
RU
Pis'mo Predsedatelja Gosudarstvennogo Soveta prof. dr G. Jablon'skogo. Memuar IV Mezhdunarodnogo Kongressa Parazitologii (ICOPA-IV, Varshava, 19-26 VIII 1978)