@book{bhlpg8009457, title = {Anales de historia natural }, volume = {v. 3 1801}, url = {https://www.biodiversitylibrary.org/page/8009457}, publisher = {Imprenta Real por P.J. Pereyra}, author = {}, year = {1801}, pages = {Page 157}, } @book{bhlpg45765386, title = {Field naturalist : journal of the Trinidad Field Naturalists' Club }, volume = {v.1-2(1835)}, url = {https://www.biodiversitylibrary.org/page/45765386}, publisher = {The Club}, author = {Trinidad Field Naturalists' Club. }, year = {1835}, pages = {Page 345}, } @book{bhlpg9868949, title = {Ideen zu einer Geographie der Pflanzen : nebst einem Naturgemälde der Tropenländer : auf Beobachtungen und Messungen gegründet, welche vom 10ten Grade nördlicher bis zum 10ten Grade südlicher Breite, in den Jahren 1799, 1800, 1801, 1802 und 1803 angestellt worden sind }, url = {https://www.biodiversitylibrary.org/page/9868949}, publisher = {Bey F.G. Cotta}, author = {Humboldt, Alexander von, 1769 -1859}, year = {1807}, pages = {Page 3}, } @book{bhlpg34111329, title = {Memoir on the physical and political geography of New Granada }, url = {https://www.biodiversitylibrary.org/page/34111329}, publisher = {T. Dwight}, author = {Dwight, Theodore, 1796 -1866}, year = {1853}, pages = {Page 100}, }