1. and 1920 Variations in farrow: with special reference to the birth weight of pigs. Univ. Illinois Agri. Exper. Station, Bulletin no. 226.
2. 1899 Sur la determination du sexe chez les animaux. Bull. sci. de la France et de la Belgique, T. 32.
3. 1875 The variation of plants and animals under domestication. London.