共 39 条
- [21] HOF JG, 1983, J LEISURE RES, V15, P1
- [22] JOHNSON GJ, 1997, SRS11 USDA FOR SERV
- [23] LEEWORTHY VR, 1996, TECHNICAL APPENDIX S
- [24] MCCOLLUM DW, 1990, RM289 USDA FOR SERV
- [26] Peterson G. L., 1983, Leisure Sciences, V6, P61, DOI 10.1080/01490408309513022
- [30] Richards M. T., 1990, Leisure Sciences, V12, P303, DOI 10.1080/01490409009513109