Jardine, A. K. 1969. Forest insect and disease survey, North Vancouver, 1968. Pages 43-53 in C.B. Cottrell and A. K. Jardine, Annual district reports, Forest Insect Disease Survey, British Columbia, 1968. Part III, Vancouver Survey District. Canada Department of Fisheries and Forestry, Forestry Branch, Forest Research Laboratory, Victoria, British Columbia, Information Report BC-X-33(III):28-53.