The Stroppel Hotel and Mineral Baths
A Spa at Midland, South Dakota Magazine, Mikkel J. Pates
This story is revised from the May/June 2013 issue of South Dakota Magazine.
https://www.southdakotamagazine.com/a-spa-at-midland
Fahrenheit 115: The hottest business idea of 1939
By Lance Nixon Lance.Nixon@capjournal.com Sep 24, 2015 Updated Sep24, 2019
Midland Where Resources Run Deep, Rapid City Journal,
Andrea J. Cook Journal staff, Nov 4, 2012
The Spa on the Prairie, Passion For Fresh Ideas
By Chantal Cooke, October 28, 2013
https://passionforfreshideas.com/healthyliving/spa-on-the-prairie/
The Stroppel Hotel http://stroppelhotel.blogspot.com/
https://www.youtube.com/watch?v=LJq9gHg_urQ
https://www.youtube.com/watch?v=AyCg8TzNBzQ
Medicinal Waters of South Dakota - Natural Resources Commision - State Geological Survey
http://www.sdgs.usd.edu/Pubs/PAPERS_PUBLICATIONS/Medicinal%20WatersSD.pdf