CONCEPTShttp://cat.aii.caas.cn/concept/170cat.aii.caas.cnhttp://eurovoc.europa.eu/891eurovoc.europa.euhttp://lod.nal.usda.gov/nalt/1868lod.nal.usda.govhttp://stitch.cs.vu.nl/vocabularies/rameau/ark:/12148/cb11931294fstitch.cs.vu.nlhttp://sws.geonames.org/337996/sws.geonames.orghttp://www.fao.org/countryprofiles/geoinfo/geopolitical/resource/Ethiopiawww.fao.orghttp://zbw.eu/stw/descriptor/17654-3zbw.eu。