Byer, Herman B. , United States. Bureau of Labor Statistics and United States. Works Progress Administration. "Mountain Division Cities, Volume VIII" in Salaries and Hours of Labor in Municipal Fire Departments, July 1, 1938 : Bulletin of the United States Bureau of Labor Statistics, No. 684 (1940). https://fraser.stlouisfed.org/title/4183/item/494401, accessed on October 20, 2018.