Downie, Norville Morgan, 1910- <br/><br/>
Basic statistical methods / 
N.M. Downie, R.W. Heath. 
 - 5th ed 
 - Manila :  National Bookstore,  c1984. 
 - viii, 371 p. : figs., tables. 
<br/><br/> Includes appendices, references, and index. 
<br/><br/><label>ISBN: </label>971-08-0503-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Statistical methods<br/>Statistics