Peter Kalm's travels in North America : the America of 1750 : the English version of 1770 /

Tekijä Kalm, Pehr, 1716-1779
New York : Dover Publications, 1966
Dover edition.

Columbus : the story of Don Cristóbal Colón, Admiral of the Ocean, and his four voyages westward to the Indies /

Tekijä Landström, Björn
New York, Macmillan 1967