www.kavb.nl

Anchor text: Official website KAVB (Royal General Bulbgrowers' Association)

Wikipedia: Koninklijke Algemeene Vereniging voor Bloembollencultuur

Anchor text: KAVB, ICRA for all Bulbous, cormous and tuberous-rooted ornamental plants, excluding Dahlia, Lilium, Narcissus, Nerines and various Australian genera

Wikipedia: International Cultivar Registration Authority

Anchor text: KAVB: Geregistreerde cultivars

Wikipedia: Johan van Scheepen

Wikipedia: List of Dahlia cultivars