Latvia University of Agriculture

原核生物、古菌、細菌、真核生物、真菌、病毒 存档副本. [2011-01-09]. （原始内容存档于2021-12-11）.  Varro on Agriculture 1, xii Loeb. Fracastoro, Girolamo (1546), De Contagione et Contagiosis

National flower of Iceland. Facts About Iceland. [2010-05-10]. （原始内容存档于2014-04-13）.  The National Flower. Ministry of Foreign Affairs of Latvia. [2011-12-29]

2004, 31 (1): 78–81. doi:10.1163/187633004x00116.  McKenna, Amy. Estonia, Latvia, Lithuania, and Poland. Britannica Educational Publishing. 2013: 132 [2022-05-19]

2007）.  Consilium - Agriculture and Fisheries. Council of the European Union. [18 January 2014]. （原始内容存档于22 December 2013）.  Article 4 of the Treaty on the

2011]. （原始内容存档于2014-08-08）.  Kuo, Chin S. The Mineral Industries of Estonia, Latvia, and Lithuania (PDF). U.S. Geolocial Survey Minerals Yearbook. U.S