Stephens, L. D. Joseph LeConte, gentle prophet of evolution, c1982 t.p. (Joseph LeConte)
University of Georgia, Department of Geology Web site, Apr. 18, 2013 (b. 1823, d. 1901)
Wikipedia 25 February 2015 (Joseph LeConte (alternative spelling: Joseph Le Conte) (February 26, 1823-July 6, 1901) was a physician, geologist, professor at the University of California, Berkeley and early California conservationist)