Gronau, Hans-Dietrich O. F., <br/><br/>
Fiftieth IMO: 50 years of International Mathematical Olympiads   
by Hans-Dietrich O. F. Gronau and Dierk Schleicher 
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 - New York  Springer  c2011 
 - xiii, 297 p. :  ill. (some col.);  23cm. 
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<br/><br/> Includes bibliographical references.  
<br/><br/><label>ISBN: </label>9783642145643 
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<br/><br/><label>Subjects--Index Terms: </label>Mathematics International Mathematical Olympiad. Mathematics -- Competitions.Number theory.  
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<br/><br/><label>Dewey Class. No.: </label>510.79  GRO