english deutsch
Concerning the Law of Segregation of Hybrids
http://www.esp.org/foundations/genetics/classical/holdings/v/hdv-00.pdf
Full text version of 1950 publication.
Intracellular Pangenesis
http://www.esp.org/books/devries/pangenesis/facsimile/
Full text facsimile of 1910 publication.