Environmentally significant areas of the Yukon Territory
1980
Theberge, John B. |
Nelson, James Gordon |
Fenge, Terry |
Ecosystem surveys
Ecology of the Aspen Parkland of western Canada : in relation to land use
1961
Bird, Ralph D. |
Is the concept of ecosystem management valid in the context of national parks? : a preliminary working document
Carbyn, Ludwig N. |
The Kalahari environment
1991
Thomas, David S. G. |
Shaw, Paul A. |
From grassland to glacier : the natural history of Colorado and the surrounding region
1992
Mutel, Cornelia Fleischer |
Emerick, John C. |
The biogeography of the British Isles : an introduction
1990
Vincent, Peter |