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Grey literature | 1959
Erosion and civilizations. Conservation education. Atomic hazards
Report on a survey of the rhinoceros area of Nepal, March and April 1959
Grey literature | 1956
Biological consequences of myxomatosis : proceedings and papers, Theme 2 of the sixth Technical Meeting of IUCN, Edinburgh, 20-28 June 1956
Grey literature | 1957
Proceedings and papers : sixth Technical Meeting held at Edinburgh in June, 1956 simultaneously with the Union's 5th General Assembly
Grey literature | 1955
Protégez aujourd'hui le monde de demain
Hydroelectricity and nature conservation : stating the case = Hydroélectricité et protection de la nature : une confrontation
Grey literature | 1953
Document préparatoire à l'intention de la Conférence internationale pour la protection de la faune et de la flore en Afrique, Bukavu, 26-31 octobre 1953
Grey literature | 1952
Proceedings and papers of the Technical Meeting held at The Hague, 20, 21 and 22 September 1951
Grey literature | 1951
Etat de la protection de la nature dans le monde en 1950 = The position of nature protection throughout the world in 1950
Jointly published | 1950
Proceedings and papers : International Technical Conference on the Protection of Nature, Lake Success, NY, 22-29 August 1949
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