Early man and the ocean: A search for the beginnings of navigation and seaborne civilizations

1980 trade paperback, Thor Heyerdahl (Kon-Tiki: Across the Pacific in a Raft). Presents Heyerdahl's original research into ancient oceanic voyages, including the Kon-Tiki and Ra expeditions, which support his theories about prehistoric voyagers traveling across the southern Atlantic to Mexico. - Google Books