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.
Keywords from Image Description:
Bombvschernobyldoserateinopenair. This is graph drawn using data calculated using method similar to that of Imanaka Fukutani Yamamoto Sakaguchi and Hoshi Radiation Research Suppl AA for calculating the dose due to the bomb fall out which calculated for surface burst with no separation of the different isotopes osti gov biblio jsp