Copyright owner: J. Tyllinen
License: CC-BY-NC-4.0
Copyright owner: J. Tyllinen
License: CC-BY-NC-4.0
Copyright owner: J. Tyllinen
License: CC-BY-NC-4.0
Copyright owner: J. Tyllinen
License: CC-BY-NC-4.0
Copyright owner: SIP Haapala
License: CC0-4.0
Copyright owner: H.Tanner
License: CC-BY-NC-4.0
Caption: Valvontavalo 250 W Hg (fi)
Copyright owner: Pentti Ketola
License: CC-BY-NC-4.0
Copyright owner: H.Tanner
License: CC-BY-NC-4.0
Caption: Valvontavalo 250 W Hg (fi)
Copyright owner: Marianne Niemelä
License: CC0-4.0
Copyright owner: Olavi Niemi
License: CC-BY-NC-4.0
Copyright owner: Olavi Niemi
License: CC-BY-NC-4.0
Copyright owner: Olavi Niemi
License: CC-BY-NC-4.0