Vries, H. de (1889). Intracellulare Pangenese. Jena: Verlag von Gustav Fischer. Translated in 1908 from German to English by C. Stuart Gager as Intracellular Pangenesis. Chicago: Open Court Publishing Co., 1910.
espacenet.com
worldwide.espacenet.com
US patent 395782, Herman Hollerith, "Art of compiling statistics", issued 1889-01-08