CitationSchomburgk;Robert H. Karte von British - Guyana;nebst dem Quelllande des Prima (Rio Branco) und Orinoco. Map. Berlin: Heliotype Printing Co.;1846. Accessed March 3;2023. https://collections.library.yale.edu/catalog/15821075.
Schomburgk;Robert H. Karte von British - Guyana;nebst dem Quelllande des Prima (Rio Branco) und Orinoco. Map. Berlin: Heliotype Printing Co.;1846. Accessed March 3;2023. https://collections.library.yale.edu/catalog/15821075.