Antártica un desafio perentorio

Eitemau Tebyg

• Amid snowy wastes: Wild life on the Spitsbergen archipelago. With two maps and 114 illustrations from photographs by the author
  gan: Gordon, Seton
  Cyhoeddwyd: (1922)
• Las aves de Chile: Su conocimiento y sus costumbres. Láminas de J. D. Goodall
  gan: Philippi, Rodulfo Amando, et al.
  Cyhoeddwyd: (1946)
• Mediterranean-type ecosystems: the function biodiversity
  gan: Davis, G. W, et al.
  Cyhoeddwyd: (1995)
• Tropical nature and other eesays
  gan: Wallace, Alfred R.
  Cyhoeddwyd: (1878)
• Views of Nature: Or contemplations on the sublime phenomena of creation; with illustrations. By Alexander von Humboldt. Translated from the german by E.C. Otté, and Henry G. Bohn. With a frontispiece from a sketch by the author, a facsimile of his handwriting, and a comprehensive index
  gan: Humboldt, Federico Enrique Alejandro, Barón de
  Cyhoeddwyd: (1850)