Onyango, John P. and A.M. Pleus <br/><br/>
A textbook of basic statistics  

 - New Age international pub,  New Delhi  1987 
<br/><br/><label>ISBN: </label>9966-46-251-8 
<br/><br/><label>LC Class. No.: </label>BSL HF 5691   / O5 1987