"Iron King Mine - Humboldt Smelter Dewey-Humboldt, AZ" By the U.S. Environmental Protection Agency
"Iron King Mine & Humboldt Smelter" By the Arizona Department Of Environmental Quality
"Field Sites: Iron King Mine & Humboldt Smelter Superfund Sites (Dewey-Humboldt, Arizona)" By The University of Arizona Superfund Research Program
"Health Consultation - Iron King Mine & Humboldt Smelter" (March 26, 2009) & "Health Consultation - Evaluation of Ambient Air Sampling Results" (February 7, 2013) By the Agency for Toxic Substances & Disease Registry
"ToxFAQs for Arsenic" By the Agency For Toxic Substances & Disease Registry
"ToxFAQs for Lead" By the Agency For Toxic Substances & Disease Registry
"How to Reduce Your Exposure to Arsenic and Lead in Dewey-Humboldt, Arizona" By the Arizona Department of Health Services & Agency for Toxic Substances & Disease Registry
"A cultural resource and historic building survey for a remedial investigation/feasibility study at the Iron King Mine-Humboldt Smelter Superfund site, Dewey-Humboldt, Yavapai County, Arizona" By Archaeological Consulting Services, Ltd.
"Planning for the Future: Reuse Assessment for Iron King Mine - Humboldt Smelter Superfund Site" By E2 Inc. for the Town of Dewey-Humboldt
"Iron King Mine - Humboldt Smelter Site (Dewey-Humboldt, Arizona) Community Involvement Plan" (October 2009) By the U.S. Environmental Protection Agency