État de la protection de la nature dans le monde en 1950 =
Subtitle: The position of nature protection throughout the world in 1950.
Contributors: International Union for the Protection of Nature.
Publisher: Union internationale pour la protection de la nature
Published: 1951
Place of publication: Bruxelles
Language: fre
Number of pages: 538
Subjects: Nature conservation.; National parks and reserves.; Natural areas.
Other titles: Position of nature protection throughout the world in 1950
Notes: Contributions in French or English.
Supplemented by: "Addendum" (viii, 151 p. 23 cm.) Published: Bruxelles, 1954. Call number: QH75.I5432
Includes bibliographical references.