- Brown, C. E., M. E. P. Cumming, and J. K. Robins. 1957. Province of Alberta, forest insect survey. Page 74 in Annual report of the Forest Insect and Disease Survey. Canada Department of Agriculture, Science Service, Forest Biology Division 1956. 74 p.
- Brown, C. E., M. E. P. Cumming, and J. K. Robins. 1958. Province of Alberta, forest insect survey. Page 67 in Annual report of the Forest Insect and Disease Survey. Canada Department of Agriculture, Science Service, Forest Biology Division 1957. 67 p.