1. Bureau of Labor Statistics (BLS) 2021c Employer Costs for Employee Compensation—June 2021. Electronic document, https://www.bls.gov/news.release/pdf/ecec.pdf, accessed October 21, 2021.
2. Vernon Research Group 2019 American Cultural Resources Association Salary Survey. American Cultural Resources Association, Washington, DC.
3. Stein, Jeff , and Laris, Michael 2021 Biden's $1.2 Trillion Infrastructure Bill Could Take Years to Transform U.S. Washington Post, August 10. https://www.washingtonpost.com/us-policy/2021/08/10/infrastructure-senate-spending-nepa/, accessed October 21, 2021.