Canadian Forest Service Publications
The balsam woolly aphid in British Columbia, 1960. 1962. Silver, G.T.; Ruppel, D.H.; Allen, S.J. Bi-monthly Progress Report 18(3): 3-4.
Year: 1962
Issued by: Pacific Forestry Centre
Catalog ID: 23888
Language: English
Series: Bi-Monthly Research Note
Availability: PDF (download)