L. Sprague de Camp: opere
- 1966 The Voices of Time: a cooperative survey of man's views of time as understood and described by sciences and by the humanities, J.T. Fraser and George Braziller Inc., [rif.]
- 1970 Ancient Ruins and Archeology, Doubleday, New York, [rif.]
- 1970 De l'Atlantide à l'Eldorado, Plon, [rif.]
- 1970 Lost Continents. The Atlantis Theme in History, Science and Literature, New York, [rif.]
- 1970 The Ancient Engineers, Doubleday, New York, [rif.]
- 1970 The Great Monkey Trial, Doubleday, [rif.]
evoluzione
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