Danube delta management objectives
1991
Protected areas
Nature in Holland : protected landscapes in the Netherlands
1991
Kers, Martin |
The economic value of wilderness : proceedings of the conference, Jackson, Wyoming, May 8-11, 1991
1992
Payne, Claire |
Bowker, J. M. |
Reed, Patrick C. |
The fifth essence : an invitation to share in our eternal heritage
Tilden, Freeman |
Heritage for tomorrow : proceedings of the Canadian Assembly on National Parks and Protected Areas
1987
Rondevlei Bird Sanctuary : annual report
Middlemiss, Ernest |
Langley, C. H. |
Conceptual proposals for Kruger- Banhine a transfrontier natural resource area
1991
Tinley, K. L. |
Van Riet, W. F. |