Walker, Helen M. <br/><br/>
Elementary Statistical methods. 

 - 1ra. ed. 
 - Nueva York :   Holt,   1958. 
 - 302 p. ; 24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ESTADISTICAS
<br/><br/><label>Index Terms--Genre/Form: </label><br/>LIBRO
<br/><br/><label>Universal Decimal Class. No.: </label>M-172