Valens, Evans G. <br/><br/>
The number of things : b Pythagoras, geometry, and humming strings / 
Evans G. Valens. 
 - London :  Methuen,  1965, c1964. 
<br/><br/>Bibliography: p. 181. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pythagorean proposition.