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- Dumbarton Oaks Colloquium on the History of Landscape Architecture 11 toradh
- Food and Agriculture Organization of the United Nations 7 toradh
- American Chemical Society. Division of Pesticide Chemistry 6 toradh
- Dumbarton Oaks 6 toradh
- International Union of Forestry Research Organizations 6 toradh
- MacDougall, Elisabeth B. 6 toradh
- United States. Forest Service 6 toradh
- American Chemical Society. Division of Agrochemicals 5 toradh
- Agronomy Society of New Zealand 4 toradh
- American Chemical Society. Meeting 4 toradh
- Baumgartner, David M. 4 toradh
- British Society for Plant Pathology 4 toradh
- Hedin, Paul A. (Paul Arthur), 1926- 4 toradh
- South Pacific Commission 4 toradh
- Association of Applied Biologists 3 toradh
- COSPAR 3 toradh
- IUCN--The World Conservation Union 3 toradh
- New Zealand Logging Industry Research Association 3 toradh
- North Atlantic Treaty Organization. Scientific Affairs Division 3 toradh
- Pacific Regional Agricultural Programme 3 toradh
- Pacific Regional Agricultural Programme. Project 1, Farming Systems in Low Lands 3 toradh
- Rogers, Steve 3 toradh
- Society of American Foresters. Physiology Working Group 3 toradh
- Southeastern Forest Experiment Station (Asheville, N.C.) 3 toradh
- University of Washington. College of Forest Resources 3 toradh
- Wolschke-Bulmahn, Joachim 3 toradh
- ANZAAS. Meeting 2 toradh
- American Phytopathological Society 2 toradh
- American Phytopathological Society. Meeting 2 toradh
- Australian Centre for International Agricultural Research 2 toradh
- Beemster, A. B. R. 2 toradh
- Biros, Francis J. 2 toradh
- Brunsden, E. R. 2 toradh
- Burdon, J. J. (Jeremy James) 2 toradh
- Chang, S. T. (Shu-ting), 1930- 2 toradh
- Day, Peter R., 1928- 2 toradh
- Drew, K. R. 2 toradh
- European Foundation for Plant Pathology. Conference 2 toradh
- Forest Products Research Society 2 toradh
- Friend, J. 2 toradh
- Hanley, Donald P., 1947- 2 toradh
- Hollaender, Alexander, 1898- 2 toradh
- Hunt, John Dixon 2 toradh
- IUFRO Congress 2 toradh
- Indian Society of Tree Scientists 2 toradh
- International Association for Genetics in Aquaculture 2 toradh
- International Atomic Energy Agency 2 toradh
- International Biological Programme 2 toradh
- International Conference on Advances in Forest and Woodland History 2 toradh
- International Space Science Symposium 2 toradh níos mó…