Awasthi, D. D <br/><br/>
A hand book of lichens 

 - Dehra Dun:  Bishen Singh Mahendra Pal Singh,  2000 
 - 157 p. : ill. ; 24 cm 
<br/><br/><label>ISBN: </label>9788121101813 
<br/><br/><label>Dewey Class. No.: </label>579.7 AWA