SARIS F, DIJK A VAN,HUSTINGS F, LENSINK R & SCHARENBURG K VAN (1993) Dutch Ornithological Union: National Day SOVON contact, and NOU Vogelbeschermin: Renewal or Several large-scale waterfowl projects in the Netherlands. LIMOSA 66 (3): 129-130.

Dutch Ornithological Union: National Day SOVON contact, and NOU Vogelbeschermin: Renewal or Several large-scale waterfowl projects in the Netherlands

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