Book “Bergslagshistoria, Argange 22, ”The book is written in Swedish. Published by Utgiven av Foreningen Bergslagsarkiv, in 2010.
or “Mountain Battle History.”
The book is about the minning areas in the middle of Sweden. Page 45 has information about Carl Roos and mentions the Goodhue County Historical Society's research library. Elisabeth Thorsell wrote the section that includes Carl Roos. She used a part of the Carl Roos papers in the Goodhue County Historical Society collection.
Sweden, Swedish history