The University of Colorado will host a three-day conference on "Regulatory Takings and Resources: What Are the Constitutional Limits?," June 13-15. The get-together features Larry MacDonnell of the Natural Resources Law Center; Lois Schiffer from the Department of Justice; Mark Squillace, law professor at the University of Wyoming, and John Echeverria, attorney with the National Audubon Society. On tap are discussions of how takings challenges affect wetlands, surface mining, public lands and endangered species. The cost of the conference is $475 before June 6, and $525 thereafter. Contact the Natural Resources Law Center, Campus Box 401, Boulder, CO 80309-0401 (303/492-1288).