Samples and sampling  : unit 11 

 - Walton Hall  ; The Open University Press  , 1984 
 - 48p. 
<br/><br/><label>ISBN: </label>0335141552  £2.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Statistics
<br/><br/><label>Dewey Class. No.: </label>519.5  / SAM