Παρόμοια τεκμήρια: Asian waterfowl census 1991
- Western palearctic and South-West Asia waterfowl census 1994
- African waterfowl census 1991
- Midwinter wildfowl census in the Western Greece 1991
- Western palearctic waterfowl cencus 1992
- Results from the International Waterbird Census in the Western Palearctic and Southwest Asia 1995 and 1996
- Midwinter waterfowl census Greece 1993
Θέμα: Μεσοχειμωνιάτικες καταμετρήσεις
Θέμα: Οικολογία
- Development of a strategy for cooperation on optimal documentation and supply of literature on ecological agriculture
- Fire in Mediterranean Ecosystems
- La Vegetation aquatique emergente
- Φύση, Κοινωνία, Επιστήμη στην εποχή των "Τρελών αγελάδων"
- First Balkan Botanical Congress
- Πρόγραμμα ανάπτυξης 1983-1987