Não informado. (1971). Seed Pathology News. Danish Government Institute of Seed Pathology for Developing Countries.
Chicago-referens (17:e uppl.)Não informado. Seed Pathology News. Copenhagen: Danish Government Institute of Seed Pathology for Developing Countries, 1971.
MLA-referens (8:e uppl.)Não informado. Seed Pathology News. Danish Government Institute of Seed Pathology for Developing Countries, 1971.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.