http://pec.lib.wvu.edu/record/P123421955Cankers and decays of birch associated with two poria species.<p> Journal article reprint from: <em>Journal of Forestry</em>, 1955:June.</p>True, R. P. (Rodney Philip), 1906-Tryon, Earl H. (Earl Haven)King, J. F.Birch--Diseases and pests.Canker (Plant disease)14256