Di Mana Gulma
Amerika Utara | Weed Science Society of America (2010) - Composite List of Weeds |
Eropa | NOBANIS - European Network on Invasive Alien Species |
Kerajaan Inggris & Irlandia | The Biological Records Centre |
Asia Timur | T. Mito & T. Uesugi (2004) - Invasive Alien Species in Japan |
Rusia | AgroAtlas - Interactive Agricultural Atlas of Russia & Neighboring Countries |
Australia | F.J. Richardson, R.G. Richardson & R.C.H. Shepherd (2007) |
Selandia Baru | NZ Plant Conservation Network |