Bryson, Bill, and Paul Barrett. A Short History Of Nearly Everything. Auckland, N.Z.: Royal New Zealand Foundation of the Blind, 2009. Print.

Smith, Douglas. “Getting the Lead Out | Caltech.” The California Institute of Technology. N.p., 21 Sept. 2015. Web. 09 Dec. 2016.

Tilton, George R. “Read “Biographical Memoirs V.74″ at” Clair Cameron Patterson | Biographical Memoirs V.74 | The National Academies Press. N.p., n.d. Web. 09 Dec. 2016.

“Clair Patterson-20th Century Geologist « Iowa Pathways.” Clair Patterson-20th Century Geologist « Iowa Pathways. N.p., n.d. Web. 09 Dec. 2016.

“1995 Tyler Laureate.” Tyler Prize for Environmental Achievement. N.p., n.d. Web. 09 Dec. 2016.

Cosmos: A Spacetime Odyssey. Dir. Brannon Braga. Perf. Neil DeGrasse Tyson. Cosmos Studios, 2014. Netflix.