Kahdella kielellä / På två språk Authors Jyrki Nummi Helsingin yliopisto DOI: https://doi.org/10.33346/joutsensvanen.114244 PDF (Suomi) Issue No. 2015 (2015) Section Editorial Published 2022-02-10 This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.