Arx, Joseph Adolf von,    1922- <br/><br/>
Keys to the genera of amerospored and didymospored pyrenomycetes ; f rom J.A. von Arx & E. Muller /    
translated into English by G.B. Butte rfill. 
 - Kew :   Commonweaith Mycological Institute,   1969. 
 - 4, 53 p. ;    25 cm. 
<br/><br/>  First published in German in Beitrage zur kryptogamenflora der Schwe iz, Bd. 1 1, Hett 1 and 2. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pyrenomycetes.--Identification.--Switzerland ----<br/>Fungi --Identification.--Switzerland ----
<br/><br/><label>Dewey Class. No.: </label>589.23 ARX