1. An address on evolution and the pathological importance of lower forms of life Author(s): Leidy, Joseph, 1823-1891 Publication: Detroit, Mich. : George S. Davis, 1886 Subject(s): Biological EvolutionBiochemical Phenomena
2. On the origin of species, or, The causes of the phenomena of organic nature: a course of six lectures to working men Author(s): Huxley, Thomas Henry, 1825-1895 Publication: New York : Appleton, 1863 Subject(s): Biological Evolution