Views of nature: or Contemplations on the sublime phenomena of creation / with scientific illustrations

by Alexander von Humboldt

[IP]. Hertha, Zeitschrift für Erd und Völkerkunde, von Berghaus, bd. xiii. 1829, s. 3–29.

[IQ]. Annales des Sciences Naturelles, t. iv. 1825, pp. 225–253.

[IR]. Berghaus, Zeitschrift für Erdkunde, band. ix. s. 322–326.

[IS]. Fitzroy, Voyages of the Adventure and Beagle, 1839, vol. ii. p. 481; Darwin, Journal of Researches, 1845, pp. 253 and 291.

[IT]. Mary Somerville, Physical Geogr., 1849, vol. ii. 425.

[IU]. Geographical Memoir upon Upper California, an illustration of his Map of Oregon and California, 1848.

[IV]. Memoir of a Tour in Northern Mexico, connected with Col. Doniphan’s Expedition, 1848.

[IW]. Expedition on the Upper Arkansas, 1845, and Examination of New Mexico in 1846 and 1847.

[IX]. Humboldt, Essai polit. sur la Nouvelle Espagne, t. i. pp. 127–136.

[IY]. Frémont, Geogr. Mem. of Upper California, 1848, pp. 8 and 67; see also Humboldt, Essai politique, t. ii. p. 261.