Nisar Ahmad <br/><br/>
Botony  viruses , Bacteria , Fungi, Alagae and lichens 

 - Islamabad  HEC  2007 
 - 309 
<br/><br/><label>ISBN: </label>9694171016 
<br/><br/><label>Subjects--Topical Terms: </label><br/>viruses, bacteria
<br/><br/><label>Dewey Class. No.: </label>579  / NIV