Gordon, Cyrus Herzl, 1908- <br/><br/>
Riddles in history 
/ by Cyrus H. Gordon 
 - Crown Publishers : New York  1974 
 - 188 p. illus. 24 cm. 
<br/><br/>Bibliography: p. 167-171. 
<br/><br/><label>ISBN: </label>0517504146 
<br/><br/><label>LCCN: </label>72-096662 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>America--Discovery and exploration--Pre--Columbian--Miscellanea