Engelmann spruce bark beetle control project, Colorado, 1950, 1951,  1950-52
By: U.S. Department of Agriculture, Forest Service and Bureau of Entomology and Plant Quarantine.
Contributors: United States. Bureau of Entomology and Plant Quarantine.
Publisher: G.P.O.
Published: 1952
Place of publication: [Washington, D.C.]
Language: eng
Subjects: Engelmann spruce -- Diseases and pests.; Engelmann spruce beetle.
Notes: Cover title.