Andrews, R. J. 1969a. Forest insect and disease survey, British Columbia. 1968: Nelson Survey District. Pages 130-133 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.