Θέμα: 1991
Θέμα: Απογραφή
Συγγραφέας: Asian Wetland Bureau (AWB)
Συγγραφέας: IWRB
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