Conflicts in national parks: A case study of helicopters and bighorn sheep time budgets at the grand canyon
Craig A. Stockwell, Gary C. Bateman, Joel BergerVolume:
56
Year:
1991
Language:
english
Pages:
329
DOI:
10.1016/0006-3207(91)90064-g
File:
PDF, 628 KB
english, 1991