Davies, P. G. <br/><br/>
Challenge mathematics  : the metric system book 3 
P. G. Davies 
 - London:  Hamish Hamilton,  1964. 
 - 95p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>372.73  / DAC