I have not read all seven articles but what I have read is well researched and considered. The link below has links to those articles and the references used.
https://newsmaven.io/indiancountrytoday/news/research-compiled-in-the-boy-scout-series-in-indian-country-today-jHVohLu1TEyc1jdf4jqn0A/
P.S. a scouter.com topic is one of references listed.