Hale, Mason E. <br/><br/>
A monograph of the lichen genus Pseudoparmelia Lynge (Parmeliaceae) / 
Mason E. Hale, Jr. 
 - Washington :  Smithsonian Institution Press,  1976. 
 - iii, 62 p. :  ill. ;  26 cm. 
 - Smithsonian contributions to botany ;  Number 31. .
<br/><br/>Includes bibliographical references : (p. 58-60) and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pseudoparmelia.