Keys to the genera of amerospored and didymospored pyrenomycetes - J. A. Von Arx; E. Muller (England Common Wealth Mycolagical Institute, 1969)
J. A. Von Arx & E. Muller: Keys to the genera of amerospored and didymospored pyrenomycetes. England. Common Wealth Mycolagical Institute, 1969.--(589.20016ARX)
ENGLISH