Keys to the genera of amerospored and didymospored pyrenomycetes ; f rom J.A. von Arx & E. Muller - Arx, Joseph Adolf von, 1922-; Muller, Emil, 1920- (Kew : Commonweaith Mycological Institute, 1969)
First published in German in Beitrage zur kryptogamenflora der Schwe iz, Bd. 1 1, Hett 1 and 2.
Keywords: Pyrenomycetes. -- Identification. -- Switzerland; Fungi -- Switzerland -- Identification