Conference of European Statistics [Ke-18 : 1970 : Geneva]. (1970). Report of the eighteenth plenary session : conference of European statististic, geenva , 15-19 June 1970. New York :: United Nations,.
Conference of European Statistics [Ke-18 : 1970 : Geneva]. Report of the eighteenth plenary session : conference of European statististic, geenva , 15-19 June 1970. New York :: United Nations,, 1970
Conference of European Statistics [Ke-18 : 1970 : Geneva]. Report of the eighteenth plenary session : conference of European statististic, geenva , 15-19 June 1970. New York :: United Nations,, 1970.