References used in research included, but not limited to:
| Jefferson County TN Budget – various years | CTAS – County Technical Assistance Service | Tennessee Department of Revenue |
| State of Tennessee Laws, including T.C.A. §§ 67-7-201 through 67-7-212. | https://www.ctas.tennessee.edu/reference/tax-statistics | U.S. Geological Survey (USGS) |
| https://minedocs.com | Nyrstar Public Reports | Tennessee Department of Transportation (TDOT) |
| Historic Mining Records (USGS) | Tennessee Valley Resources | FindLaw |
| https://thediggings.com/usa/tennesse | https://www.wbir.com | The Spokesman-Review |
| The Standard Banner | https://www.wate.com | Hyder Paving |
| Various Jefferson County Commission meetings – YouTube recording, newspaper reviews, documents | Facebook – examples of roads needing repair | Knoxville – Knox County Planning |
| The National Stone, Sand & Gravel Association (NSSGA) | www.trucking.org | Justia Law |
| University of Tennessee | www.globaldata.com | |
| All other Counties in Tennessee – meeting minutes, newspaper articles, media reports. | Owner-Operator Independent Truckers Association | Korea Zinc – articles and financial data |
| www.tn.gov | Titan Mining Corporation | Gravelshop |
| The Tennessean | Stansberry Research | Yahoo Finance |
| Martin Marietta Materials | IBIS World | Aggregate Materials |
| Knoxville News Sentinel | Bluecap Economic Advisors | Financial Models Lab |
| https://pubs.geoscienceworld.org/ | Tennessee Mining Association (TMA) | www.miningdataonline.com |
| Gurufocus.com | Altimetry.com | www.spglobal.com |
| https://www.ssga.com | www.northwesternmutual.com/investments | www.fidelity.com |
| www.interactivebrokers.com | www.charlesschwab.com | Carson Newman University Library |