Bulletin - United States. Bureau of Entomology. (G.P.O, 1907)
Some no. issued in subsequent rev. eds. --- Each issue has distinctive title. --- Issued by the bureau under it's former name: Division of Entomology. --- "New series" dropped from numbering with no. 41 (1903).
Keywords: Entomology; Insect pests; Insects; United States