1. Anonym: Potato. Scott. Plant Breed. Stat. Ann. Rep., 5–12 (1964).
2. Baerecke, M. L.: Versuche zur Resist enzzüchtung gegen das S-Virus der Kartoffel mit Hilfe der Sorte Saco. Eur. Potato J.10, im Druck (1967).
3. Bagnall, R. H.: Saco potato infected with potato virus S by grafting. Phytopathology55, 707 (1965).
4. Bagnall, R. H., R. H. Larson, andJ. C. Walker: Potato viruses M, S, and X in relation to interveinal mosaic of the Irish Cobbler variety. Res. Bull.198, Univ. of Wisconsin, Madison, USA, 1–45 (1956).
5. Bagnall, R. H., andD. A. Young: Inheritance of immunity to virus S in potatoes. Am. Potato J.37, 311, Abstr. (1960).