1. A national survey of Conservation Reserve Program (CRP) participants on environmental effects, wildlife issues, and vegetation management on program lands. Biological Science Report;Allen,2003
2. Conservation Reserve Program (CRP) contributions to wildlife habitat, management issues, challenges and policy choices—an annotated bibliography;Allen;U.S. Geological Survey Scientific Investigations Report 2012-,2012
3. Recreational use & economics of conservation Reserve program (CRP) acreage: A national survey of landowners;Allen,2008
4. Agricultural and recreational impacts of the conservation reserve program in rural North Dakota, USA;Bangsund;Journal of Environmental Management,2004
5. The role of farm policy in achieving large-scale conservation: Bobwhite and buffers;Burger;Wildlife Society Bulletin,2006