| Authors(s) | Wood, R.O. and D.A. Ross |
| Year | 1972 |
| Title | Pine needle scale and black pineleaf scale in British Columbia. Pest Leaflet, Forest Insect and Disease Survey, Canada, No. 40. 7 pp. |
| Authors(s) | Wood, R.O. and D.A. Ross |
| Year | 1972 |
| Title | Pine needle scale and black pineleaf scale in British Columbia. Pest Leaflet, Forest Insect and Disease Survey, Canada, No. 40. 7 pp. |