[en] [Gutenberg 49753] • Travels Through the Interior Parts of North America, in the Years 1766, 1767 and 1768 Gale Ecco, Sabin Americana
[en] [Gutenberg 48770] • The travels of Pedro de Cieza de Léon, A.D. 1532-50, / contained in the first part of his Chronicle of Peru Cambridge University Press
[en] [Gutenberg 53177] • Travels on the Amazon Kessinger Publishing
[en] [Gutenberg 48235] • Maximilian, Prince of Wied's, Travels in the Interior of North America, 1832-1834, part 3 and appendix Createspace Independent Publishing Platform
[en] [Gutenberg 47392] • Maximilian, Prince of Wied's, Travels in the Interior of North America, 1832-1834, part 2 Createspace Independent Publishing Platform
[en] [Gutenberg 38784] • Maximilian, Prince of Wied's, Travels in the Interior of North America, 1832-1834, part 1 Createspace Independent Publishing Platform