Bowes, Andrea, Collins, Stephen, Elliott, Shannon, Harris, La Tasha, Hazlett, Laura, Methe, Ester, Razak, Muhammadin, and Subagiyo, Pugi Yosep. 1991. Important Early Synthetic Dyes: Chemistry, Constitution, Date, Properties, Ballard, Mary W., editor. Suitland, MD: Conservation Analytical Laboratory, Smithsonian Institution.