Scientific basis for soil protection in the european community
1987
Barth, H. |
L'Hermite, P. |
Conservation strategies
Fuelwood : the energy crisis that won't go away
1984
Eckholm, Erik |
Foley, Gerald |
Barnard, Geoffrey |
Timberlake, Lloyd |
Coastal 2000 recommendations for a resource management strategy for Sri Lanka's coastal region
1992
Olsen, Stephen B. |
Sadacharan, D. |
Samarakoon, J. I. |
White, Alan T. |
Developing our environmental strategy
Cooke, John |
Campbell, Alec C. |
Czynna ochrona zwierzat
1992
Olaczek, Romuald |
Tomialojcia, Ludwika |