Griffiths, Samuel Robert <br/><br/>
Educational statistics for beginners / 
by S. R. Griffiths and L. W. Downes 
 - London :  Methuen Educational,  1969 
 - vi, 151 p. :  ill. ;  20 cm. 
<br/><br/><label>ISBN: </label>423428705e 
<br/><br/><label>LCCN: </label>78-444969 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Statistics