Waar Onkruid
Noord-Amerika | US Department of Agriculture |
Europa | NOBANIS - European Network on Invasive Alien Species |
Middellandse | Les Adventices des Cultures Mediterraneennes en Tunisie |
Rusland | Чужеродные виды на территории России |
Midden-Oosten | Food & Agriculture Organization of the United Nations |
Australië | R.P. Randall (2007) - The Introduced Flora of Australia and its Weed Status |