Proceedings and papers of the fourth General Assembly held at Copenhagen, Denmark, 25 August to 3 September 1954 : statutory meetings
1955
IUCN General Assembly
Proceedings and reports of the second session of the General Assembly held in Brussels, 18-23 October 1950 in the Institut de Sociologie Solvay de l'Université Libre de Bruxelles
1951
Bernard, Ch. J. |
International Union for the Protection of Nature established at Fontainebleau, 5 October 1948
1948
Bernard, Ch. J. |