Tanzania journal of science /   University of Dar es salaam.- 

 - Dar es salaam:  Faculty of Science ,University of Dar es salaam,  2006. 
 - 111p.;  22cm.  Volume 32 (No. 1) June 2006 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISSN: </label>0856-1761 
<br/><br/><label>Dewey Class. No.: </label>EA.505.09678 TAN