A disease of pines caused by Cronartium pyriforme /
Hedgcock, George G. 1863-1946.
A disease of pines caused by Cronartium pyriforme / by George G. Hedgcock and William H. Long. - Washington, D.C. : U.S. Dept. of Agriculture, 1915. - 20 p., 2 p. of plates : 1 map ; 23 cm. - Bulletin / United States Department of Agriculture ; no. 247 . - Bulletin (United States. Department of Agriculture) ; no. 247. .
Caption title. Contribution from the Bureau of Plant Industry. "Professional paper."
Bibliography: p. 20.
agr15001023
Pine--Diseases and pests.
S21 / .A7 no. 247
1 / Ag84B no.247
A disease of pines caused by Cronartium pyriforme / by George G. Hedgcock and William H. Long. - Washington, D.C. : U.S. Dept. of Agriculture, 1915. - 20 p., 2 p. of plates : 1 map ; 23 cm. - Bulletin / United States Department of Agriculture ; no. 247 . - Bulletin (United States. Department of Agriculture) ; no. 247. .
Caption title. Contribution from the Bureau of Plant Industry. "Professional paper."
Bibliography: p. 20.
agr15001023
Pine--Diseases and pests.
S21 / .A7 no. 247
1 / Ag84B no.247