Andrews, R. J. 1969b. Forest insect and disease survey, West Nelson, 1968. Pages 134-143 in R.J. Andrews, H. Vanderwal, and N. G. Bauman. Annual district reports: Forest Insect and Disease Survey: British Columbia, 1968: Part VI, Nelson Survey District. Canada Department of Fisheries and Forestry, Forestry Branch, Forest Research Laboratory, Victoria, British Columbia, Information Report BC-X-33(6):130-169.