| Hydrology and the Management of Watersheds KN Brooks, PF Ffolliott, JA Magner John Wiley & Sons, 2012 | 1184 | 2012 |
| Hydrology and the Management of Watersheds. KN Brooks, PF Ffolliott, HM Gregersen, LF DeBano | 424 | 2003 |
| Pricing policy in nature-based tourism JG Laarman, HM Gregersen Tourism management 17 (4), 247-254, 1996 | 344 | 1996 |
| People and trees: The role of social forestry in sustainable development. Seminar series H Gregersen, S Draper, D Elz International Bank for Reconstruction and Development, Washington, DC (USA …, 1989 | 221 | 1989 |
| Tropical deforestation: the human dimension LE Sponsel, TN Headland, RC Bailey Columbia University Press, 1996 | 181 | 1996 |
| Does the opportunity cost approach indicate the real cost of REDD+? Rights and realities of paying for REDD+ H Gregersen, H El Lakany, A Karsenty, A White Rights and resources initiative, 2010 | 167 | 2010 |
| Firewood crops: shrub and tree species for energy production ES Ayensu, JG Bene, JS Bethel, L Boulos, G Budowski, J Burley, ... Washington, DC: National Academy of Science,, 1983 | 164* | 1983 |
| Integrated watershed management: Connecting people to their land and water HM Gregersen, PF Ffolliott, KN Brooks CABI, 2007 | 125 | 2007 |
| Guidelines for economic appraisal of watershed management projects HM Gregersen Food & Agriculture Org., 1987 | 121 | 1987 |
| Forest governance in federal systems: An overview of experiences and implications for decentralization HM Gregersen, A Contreras-Hermosilla, A White, L Phillips The Politics of Decentralization, 13-31, 2012 | 108 | 2012 |
| Economic analysis of forestry projects. HM Gregersen, AH Contreras | 91 | 1979 |
| Valuing forests: context, issues and guidelines HM Gregersen Food & Agriculture Org., 1995 | 85 | 1995 |
| Hydrology and the management of watersheds. Ames KN Brooks, PF Ffolliott, HM Gregersen, JL Thames Iowa State University Press, 1991 | 79 | 1991 |
| Dryland forestry: planning and management PF Ffolliott, KN Brooks, HM Gregersen, AL Lundgren John Wiley & Sons, 1994 | 66 | 1994 |
| Watershed management: A key to sustainability KN Brooks, HM Gregersen, PF Ffolliott, KG Tejwani Managing the world’s forests: Looking for balance between conservation and …, 1992 | 62 | 1992 |
| Economic assessment of forestry project impacts HM Gregersen, AH Contreras Food & Agriculture Org., 1992 | 60 | 1992 |
| ECONOMIC EVALUATION OF WATERSHED PROJECTS ‐ AN OVERVIEW METHODOLOGY AND APPLICATION1 KN Brooks, HM Gregersen, ER Berglund, M Tayaa JAWRA Journal of the American Water Resources Association 18 (2), 245-250, 1982 | 55 | 1982 |
| Motivating Private Forestry–An Overview RA Skok, HM Gregersen Journal of Forestry 73 (4), 202-205, 1975 | 54 | 1975 |
| Forests and Floods Drowning in fiction or thriving on facts? F Aylward, KN Brooks, N Bryon, IR Calder, B Cambell, PC Dugan, P Durst, ... RAP Publication 2005/03, 2005 | 49 | 2005 |
| Enhancing ex post impact assessment of agricultural research: the CGIAR experience T Kelley, J Ryan, H Gregersen Research Evaluation 17 (3), 201-212, 2008 | 42 | 2008 |
