HARPER, W. M. <br/><br/>
Statistics: The M & E Handbook Series 

 - 2nd Ed. 
 - Suffolk,  Macdonald and Evans Ltd.  1977. 
 - xiii, 354p.: ill.; graph & table.  Index  18cm. 
<br/><br/><label>ISBN: </label>0 7121 1955 6 
<br/><br/><label>Dewey Class. No.: </label>LM 519.5 HAR