Travels in brazil, in the year 1817-1820. Undertaken by command of his majesty the King of Bavaria/ by Dr. Joh. Bapt. Von Spix, and Dr. C. F. Phil. Von Martius . - London: printed for Longman, Hurst, rees, Orme, Brown, and Green, 1824 . - 2 vol. ([24], 327 p.) (VIII, 298 p.)