One of his most famous works is the novel Aniara (1956) which in 1959 became an Opera, composed by Karl-Birger Blomdahl.
Links:
http://www.kirjasto.sci.fi/harrymar.htm
... have someone living alone who is 65 years of age or older. The average household size is 2.86 and the average family size is 3.32. In the town the population is spread out ...