A new leaf and twig disease of Picea engelmanni
Subtitle: (A preliminary report)
By: By James R. Weir
Publisher: U.S. Department of Agriculture
Published: 1915
Place of publication: Washington, D. C
Language: eng
Number of pages: 254
Subjects: Spruce; Diseases and pests
Notes: Reprint from Journal of Agriculture Research, v. 4 no. 3, June 1915, p. 251-254.