A disease of pines caused by Cronartium pyriforme Hedgcock, George G. (George Grant) 1863-1946 creator Long, W. H. (William Henry) 1867-1947 text bibliography dcu Washington, D.C U.S. Dept. of Agriculture 1915 monographic eng
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20 p., 2 p. of plates : 1 map ; 23 cm. by George G. Hedgcock and William H. Long. Caption title. Contribution from the Bureau of Plant Industry. "Professional paper." Bibliography: p. 20. Pine Diseases and pests S21 .A7 no. 247 Bulletin (United States. Department of Agriculture) ; no. 247 agr15001023 Library, U.S. Dept. of Agriculture 850611 20260227110937.0 agr15001023