Walton, John <br/><br/>
Six explorers : Marco Polo, Christopher Columbus, Captain Cook, Captain Sturt, Dr. Livingstone, Captain Scott   

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 - London  Oxford University Press  1942 
 - 62 p. 
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<br/><br/><label>ISBN: </label>
<br/><br/><label>Dewey Class. No.: </label>920  / W24S