International conference on the conservation of wetlands and waterfowl : proceedings 1972 Carp, Erik |
Preliminary review of the wetlands of international importance in the Mediterranean region 1977 Carp, Erik |
Proceedings : International Conference on the Conservation of Wetlands and Waterfowl, Ramsar, Iran, 30 January - 3 February 1971 1972 Carp, Erik |
