TY - BOOK TI - Circular VL - no.20:rev. (1908:June) UR - https://www.biodiversitylibrary.org/item/46179 PB - The Division CY - [Washington, D.C.] PY - 1908 N1 - Each no. has also a distinctive title. --- Description based on: 2nd ser., no. 2 (June 1891); title from cover. --- Some no. issued in rev. ed., and, by Division under its later name: Bureau of Entomology. --- Continued by: Circular (United States. Bureau of Entomology). AU - United States. Bureau of Entomology. KW - Insect pests KW - United States ER -