Contribution to Book
Ontario Ministry of Natural Resources
D.C.F. Fayle, L. Zsuffa, H.W. Anderson
Poplar research, management and utilization in Canada. Report 19. Proceedings of the North American Poplar Council Annual Meeting, 1977
Forest Research Information Paper No. 102
Navratil, S., "Virus and virus-like diseases of poplar: Are they threatening diseases?" (1979). Aspen Bibliography. Paper 4635.