共 27 条
[1]
[Anonymous], HOL FOOTPR PRACT TOO
[2]
BUDEANU A, 1999, IIIEE COMMUNICATIONS, P6
[3]
BUDEANU A, 2000, 9 NORD TOUR RES C BO
[4]
BUTLER R, 1998, SUSTTAINABLE TOURISM
[5]
Clarke J., 1997, Journal of Sustainable Tourism, V5, P224, DOI 10.1080/09669589708667287
[6]
CURTIN S, 1999, INT J TOURISM RES, V17, P135
[7]
*DRV, FACTS FIG GERM TRAV
[8]
*EEA, 2001, SIGN 2001 REP
[9]
*ENS, GRIM FUT FOR WORLDS
[10]
*ENS, 1999, TOUR IND SERV CLIM C