Did comets kill the dinosaurs? (Isaac Asimov's library of the universe)

Name: Did comets kill the dinosaurs? (Isaac Asimov's library of the universe)
Author: /author/%D8%A5%D8%B3%D8%AD%D9%82_%D8%B9%D8%B8%D9%8A%D9%85%D9%88%D9%81_(Foundation)