Authors
Liina Jürisoo
Estonian University of Life Sciences, Institute of Forestry and Rural Engineering, Tartu, Estonia
Allar Padari ja Rein Drenkhan
Estonian University of Life Sciences, Institute of Forestry and Rural Engineering, Tartu, Estonia
© 2021 Liina Jürisoo, Allar Padari ja Rein Drenkhan, published by Estonian University of Life Sciences
This work is licensed under the Creative Commons Attribution 4.0 License.