Christiansen, E. 1991. Ips typographus and Ophiostoma polonicum versus Norway spruce: joint attack and host defense. Pages 321-334 In Y.N. Baranchikov, W.J. Mattson, F.P. Hain and T.L. Payne (eds.), Forest insect guilds: Patterns of interactions with host trees. United States Department of Agriculture, Forest Service, Northeastern Forest Research Station (Radnor, PA), General Technical Report NE-153.
Christiansen 1991
Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
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