Hale, Mason E., Jr. <br/><br/>
A monograph of the lichen genus bulbothrix Hale (Parmeliaceae) 

 - Washington :  Smithsonian Institution,  1976 
 - 28 p.  : ilus. 
 - Smithsonian contributions to botany  ; 32 .
 - Smithsonian contributions to botany  ; 32 .
<br/><br/><label>LCCN: </label>24289 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Parmeliaceas.