Kus Umbrohi
Põhja-Ameerika | Weed Science Society of America (2010) - Composite List of Weeds |
Lõuna-Ameerika | Inter-American Biodiversity Information Network |
Euroopa | NOBANIS - European Network on Invasive Alien Species |
Lõuna-Aafrika | I.A.W. MacDonald (2003) - Invasive Alien Species in Southern Africa |
Austraalia | R.P. Randall (2007) - The Introduced Flora of Australia and its Weed Status |