Vito Volterra and theoretical ecology.
D001703:Biophysics; D004463:Ecology / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007558:Italy; D008433:Mathematics; D011156:Population Density; D011158:Population Growth; D012098:Reproduction; D012744:Sex Ratio