Canadian Forest Service Publications
Dieback and abnormal growth of yellow birch induced by heavy fruiting. 1968. Gross, H.L.; Harnden, A.A. Government of Canada, Department of Forestry and Rural Development, Forest Research Lab., Ontario Region, Sault Ste. Marie, ON. Information Report O-X-79.
Available from: Great Lakes Forestry Centre
Catalog ID: 8822