UNESCO

IUCN yearbook : annual report of the International Union for Conservation of Nature and Natural Resources for 1973

1974

IUCN yearbook : annual report of the International Union for Conservation of Nature and Natural Resources for 1972

1973

Project aqua : a source book of inland waters proposed for conservation

1971 Luther, H. | Rzóska, J. | Worthington, E. B. |

United Nations list of national parks and equivalent reserves, part 2

1962

First World Conference on National Parks : proceedings

1964

Soil and water conservation. Vegetation controls erosion. Dams and landscapes. Ecology and landscapes

1960

Protégez aujourd'hui le monde de demain

1955

Etat de la protection de la nature dans le monde en 1950 = The position of nature protection throughout the world in 1950

1951

Proceedings and papers : International Technical Conference on the Protection of Nature, Lake Success, NY, 22-29 August 1949

1950 Harroy, Jean-Paul |

Preparatory documents to the International Technical Conference on the Protection of Nature, August 1949, United States

1949

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