The light and the dark : a reassessment of the discovery of the Coalsack nebula, the Magellanic clouds and the Southern Cross / Elly Dekker.
Abstract:
From the summary. 'Early observations of the southern celestial sky were reported in many 16th century books and compilations of voyages of discovery. Here we analyse these accounts in order to find out what was really seen and reported by the first navigators.'
Annals of science Vol. 47 (1990), p. 529-560