- Westveld, M.
USDA Forest Service
Memo from M. Westveld (Silviculturalist) to H. B. Peirson (USFS). Re: Rating budworm vulnerability of spruce-fir stands.
At an informal gathering of forest entomologists in Montreal on January 24-27, 1945, discussion revolved around the question of how to appraise the relative vulnerability of various stands to budworm attack. The group gave general approval to the description of vulnerable stands described in this document.