共 31 条
[1]
[Anonymous], INT176 USDA FOR SERV
[2]
[Anonymous], TRENDS
[3]
[Anonymous], 1987, PNat Wildn Res Conf. General Technical Report INT-220
[4]
[Anonymous], NPSNRVTNRR9106 US DE
[6]
Brunson M., 1990, Leisure Sciences, V12, P197, DOI 10.1080/01490409009513100
[7]
Bryant W.S., 1993, Biodiversity of the Southeastern United States: Upland Terrestrial Communities, P143
[9]
COLE DN, 1996, UNPUB
[10]
COLE DN, 1982, INT284 USDA FOR SERV