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Scientific Careers in the Agricultural Research Service
John Martin Miller
William Crawford Kennard
Frederick Paul Keen
H. F. Winters
出版
U.S. Department of Agriculture
, 1959
URL
http://books.google.com.hk/books?id=fXy0HhB0XVcC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN
註釋
This publication reviews the results of research on the western pine beetle up to July 1, 1952. It shows the progress that has been made in over a half-century of study of this one bark beetle. It also records the trials and errors--the research that ran into blind alleys. The record of this pioneer effort in the field of forest entomology in the United States should be of great help to research workers who are faced with similar problems.
