Sippell, W. L., A. H. Rose, and H. L. Gross. 1974. Ontario Region. Pages 50-69. Canada Department of Environment, Canadian Forestry Service, Forest Insect and Disease Survey, Annual Report 1973. 101 p.
Sippell et al. 1974
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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