1. Public Environmental Amenity Benefits of Private Land: The Case of Prime Agricultural Land;Bergstrom;Southern Journal of Agricultural Economics,1985
2. Bishop, R. C. and Heberlein, T. A. (1980). Simulated Markets, Hypothetical Markets, and Travel Cost Analysis: Alternative Methods of Estimating Outdoor Recreation Demand. Department of Agricultural Economics Staff Paper 187, University of Wisconsin.
3. Boyle, K. J. and Bishop, R. C. (1984). Economic Benefits Associated With Boating and Canoeing on the Lower Wisconsin River. Department of Agricultural Economics, Economic Issues 84, University of Wisconsin.
4. Estimating Option Price and Existence Values for Wildlife Resources;Brookshire;Land Economics,1983