Nelson Sanjad https://www.cepese.pt/portal.%22%22%22%22%22/en/publications/authors/nelson-sanjad https://www.cepese.pt/portal.%22%22%22%22%22/@@site-logo/CEPESE+home.png Nelson Sanjad Artigos As fronteiras do ultramar: engenheiros, matemáticos, naturalistas e artistas na Amazônia, 1750-1820 2007