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1by Sanders, C.J. (ed.), Entomological Society of America, Lanham, MD (USA) eng, CANUSA Spruce Budworms Research Symposium eng 16-20 Sep 1984 Bangor, ME (USA), Stark, R.W. (ed.), Mullins, E.J. (ed.), Murphy, J. (ed.), Society of American Foresters, Washington, DC (USA) eng, Canadian Inst. of Forestry, Ottawa, Ontario (Canada) eng
Published 1985Texto bibliotecaFAO IT