This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Thermocolorimetrecorrection. Thermocolorimtre avec affichage de la correction own assumed Lefrancq Check categories May fr Thermocolorimtre Photography Thermocolorimetre
Page 2023 Free-images.com. All images are Public Domain