"Henry Augustus Rowland 1848-1901," AIP Center for History of Physics, https://www.aip.org/history/gap/Rowland/Rowland.html (accessed 06/24/2015)
Thomas C. Mendenhall "Biographical Memoir of Henry Augustus Rowland 1848 – 1901," National Academy of Sciences,
http://www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/rowland-henry.pdf (accessed 06/24/2015)"Henry Augustus Rowland," APS, http://www.aps.org/programs/outreach/history/historicsites/rowland.cfm (accessed 06/24/2015)