Izvor: Wikipedija
Male Narwhal or Unicorn (Monodon monoceros) and Greenland Shark (Somniosus microcephalus)
In An account of the Arctic regions with a history and description of the northern whale-fishery, by W. Scoresby. 1820. P. 588, Vol. II. Plate XV. Library Call Number G742 .S42 1820 .
Poveznice
Na ovu sliku vode poveznice sa sljedećih stranica: