Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Keimer, C. 1990. Decline of apple trees in the Geneva region, relationships between soil and plant. Revue Suisse de Viticulture, d'Arboriculture et d'Horticulture 22365-369.
Taxa (in this database) mentioned in this work, by keyword: