Lenchner, George. <br/><br/>
Mathematical olympiad contest problems / 
George Lenchner. 
 - Glenwood :  Nueva York,  c1976. 
 - 175 p. :  fot.ocopia ;  28 cm 
<br/><br/><label>ISBN: </label>0962666203 
<br/><br/><label>Subjects--Index Terms: </label>Matemáticas-Enseñanza