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National Geographic : 1993 Jan
Contents
,' fir riw r e , s1 cs a.' 'Vi :.r".; > ,,{ATM d ." .:: ,}i . ' , ok, ': ,;:a; 'yte 4 .iR ryi SS ki . have descended from dinosaurs that crossed an intercontinental land bridge during the late Cretaceous period. Or they may have belonged to the same genus. Ongoing expeditions to the rich bone beds of the Far East seek answers to such puzzles. 45
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