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

 - 3rd Ed. 
 - Suffolk,  Macdonald and Evans Ltd.  1977. 
 - xiii, 354p.: ill.; graph, table,  Index,  17cm. 
<br/><br/><label>ISBN: </label>0 7121 1955 8 
<br/><br/><label>Dewey Class. No.: </label>LM 519.5 HAR