1.		Community-tourism ties / Wesley S. Roehl, Robert B. Ditton, Daniel R. Fesenmaier Autor: Roehl, Wesley S. Coautor: ; Ditton, Robert B. Fesenmaier, Daniel R.
2.		Effect of social group, activity, and specialization on recreation substitution decisions / Seungdam Choi, David K. Loomis, Robert B. Ditton Autor: Choi, Seungdam Coautor: ; Loomis, Davis K. Ditton, Robert B.
3.		An ecotourism perspective on billfish fisheries / Stephen M. Holand, Robert B. Ditton, Alan R. Graefe Autor: Holland, Stephen M. Coautor: ; Ditton, Robert B. Graefe, Alan R.
4.		A response to ecotourism on trial : the case of billfisf angling as ecotourism / Stephen M. Holland, Robert B. Ditton, Alan R. Graefe Autor: Holland, Stephen M. Coautor: ; Ditton, Robert B. Graefe, Alan R.
5.		Understanding differences in nonmarket valuation by angler specialization level / Chi-Ok Oh [et al.] Resp- Sec.: Chi-Ok, Oh Ditton, Robert B. Anderson, David K. Scott, David Stoll, John R.