1. Chemical control of spruce cone insects in seed orchards;Annila;Commun. Inst. For. Fenn.,1973
2. Guidelines to collecting cones of B.C. conifers;Dobbs;British Columbia Forest Serv./Can. For. Serv. Joint Rep. No. 3,1976
3. White spruce cone crops in relation to seed yields, cone insect damage, and seed moth populations;Fogal,1990
4. Insects attacking white spruce cones in three habitats;Fogal,1977
5. Systemic insecticides for protecting northern spruce and pine seed trees;Fogal;For. Can. Inf. Rep. PI-X-92,1989