"ToxFAQs for Lead". Agency for Toxic Substances and Disease Registry. August 2007. Archived from the original on 8 December 2009. Retrieved 15 May 2012.
Guenther, Richard (24 February 1904). "Dangers of White Lead". Hathitrust. Sherwin Williams Co. Archived from the original on 12 August 2018. Retrieved 31 October 2014.
"The Lead Disclosure Rule". Washington, DC: US Department of Housing and Urban Development. Archived from the original on 13 January 2020. Retrieved 8 February 2021.
Guenther, Richard (24 February 1904). "Dangers of White Lead". Hathitrust. Sherwin Williams Co. Archived from the original on 12 August 2018. Retrieved 31 October 2014.
"ToxFAQs for Lead". Agency for Toxic Substances and Disease Registry. August 2007. Archived from the original on 8 December 2009. Retrieved 15 May 2012.
"The Lead Disclosure Rule". Washington, DC: US Department of Housing and Urban Development. Archived from the original on 13 January 2020. Retrieved 8 February 2021.
Ayaß, Wolfgang[in German], ed. (1 January 1999). Quellensammlung zur Geschichte der deutschen Sozialpolitik 1867 bis 1914, II. Abteilung: Von der kaiserlichen Sozialbotschaft bis zu den Februarerlassen Wilhelms II. (1881–1890), 3. Band: Arbeiterschutz [Collection of Original Texts on the History of German Social Policy from 1867 through 1914, 2nd Series: from the Imperial Social Message Through the February Decrees of Wilhelm II (1881–1890), 3rd volume: Worker protection] (in German). Darmstadt: Wissenschaftliche Buchgesellschaft. ISBN3-534-13440-0., sections 26 & 121