A disease of pines caused by Cronartium pyriforme - Hedgcock, George G. (George Grant), 1863-1946.; Long, W. H. (William Henry), 1867-1947. (Washington, D.C. : U.S. Dept. of Agriculture, 1915)
Caption title.
Bibliography: p. 20.
Contribution from the Bureau of Plant Industry.
"Professional paper."
Keywords: Pine -- Diseases and pests