Extent of Decay in Poplar as Indicated by the Presence of Sporophores of the Fungus Fomes Igniarius Linn.
Bier, J.E. and Riley, C.G. 1936. Extent of decay in poplar as indicate by the presence of sporophores of the fungus fomes igniarius linn. Forestry Chronicle. 12(2): 249-253.