Book:
Mason, Peter. 2008. Tourism, impacts, planning and management. Butterworth-Hienemann, Oxford united Kingdom. 62 p.
Article:
Heacox, Kim. 1994. "Alaska's Yellowstone." Wildland Conservation. 97(2), 66.
Book:
Mason, Peter. 2008. Tourism, impacts, planning and management. Butterworth-Hienemann, Oxford united Kingdom. 62 p.
Article:
Heacox, Kim. 1994. "Alaska's Yellowstone." Wildland Conservation. 97(2), 66.
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