Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Ives, W. G. H., N. R. Brandt, and J. G. Laut. 1970. Manitoba-Saskatchewan Region. Pages 72-83. Canada Department of Fisheries and Forestry, Canadian Forestry Service, Forest Insect and Disease Survey, Annual Report 1969. 125 p.