L. SPRAGUE DE CAMP The Ragged Edge of Science. 1st ed. Science essays
THE RAGGED EDGE OF SCIENCE by L. SPRAGUE DE CAMP. Owlswick Press, 1980. 1st edition. As-new hardcover in dustjacket. Not a circulated copy. Along with Isaac Asimov and Willy Ley, he was one of the great science-explainers of the period.
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