Stig Kjell Olof ( Ola ) Ullsten ( born 23 June 1931 ) is a Swedish former politician and diplomat who was Prime Minister of Sweden from 1978 to 1979 and leader of the Liberal People 's Party from 1978 to 1983 .
Stig Kjell Olof ( Ola ) Ullsten , born 23 June 1931 in Umeå , Sweden , is a Swedish former politician and diplomat . He served as the Prime Minister of Sweden from 1978 to 1979 He was also the leader of the Liberal People 's Party from 1978 to 1983 .