1. Social conditions and preference data for visitors to three wilderness areas in the southern United States in 1989-1990
- Author(s):
- Watson, Alan E.; Daigle, John J.; Niccolucci, Michael J.
2. John Muir Wilderness and Sequoia-Kings Canyon National Parks Wilderness: 1990 visitor survey data
- Author(s):
- Watson, Alan E.; Niccolucci, Michael J.; Williams, Daniel R.