https://www.sofisworld.net/index.php/projekte/biogas-taita-projekt/bildershow-anlage-mr-kalela/1-bildershow-anlage-mr-kalela-taita/detail/18-12cbmmr-msengetiburaday52?tmpl=component&phocaslideshow=1
Bildershow - Anlage Mr. Kalela - Taita
anlagekalelataita
https://www.silvafennica.fi/article/7337
Kalela E. K. (1937) Forest fires in the insured forests in Finland in 1925-1934
e kforest firesin thekalelainsured