Proceedings - International Conference on the Conservation of Wetlands and Waterfo wl, Heiligenhafen, Federal Republic of Germany, 2-6 December, 197 4; Smart, M. (Slimbridge : International waterfowl Research Bureau., 1976)
Keywords: Nature conservation -- Congresses. -- Congresses; Wetlands -- Congresses. -- Congresses; Waterfowl -- Congresses