1. Fertilizer studies as a basic technique;Armson;XVI JUFRO World Congress,1976
2. Multipurpose forestry in a world of limited remains;Bendz;XVI JUFRO World Congress,1976
3. Damage by heavy vehicles in thinnings;Björkhem;Journal of the Royal Academy of Agriculture and Forestry,1974
4. Mobilizing world land remains to meet the growing needs for food, fibre, forest products, wildlife and recreation;Borlaug;XVI JUFRO World Congress,1976
5. Problems related to analysis of forest soil fertility;Von den Burg;XVI JUFRO World Congress,1976