File:Olivenca Portugal.png - Wikimedia Commons

Spain – Barry's Borderpoints

Pin en Brasões

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Unravelling the mosquito-haemosporidian parasite-bird host network in the southwestern Iberian Peninsula: insights into malaria infections, mosquito community and feeding preferences, Parasites & Vectors

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File:Map of Portugal (including Olivença and Talega)2.svg - Wikimedia Commons

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Sustainability, Free Full-Text

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I tried to find the date of origin for every international border [OC] [5446x6217] : r/MapPorn