1975 United Nations list of national parks and equivalent reserves /

1993 United Nations list of national parks and protected areas = Liste des Nations Unies des parcs nationaux et des aires protégées 1993 = Lista de las Naciones Unidas de Parques Nacionales y Areas Protegidas 1993 /

Ecological monitoring and desertification control in Argentina /

Good earth-keeping : education, training and awareness for a sustainable future /

Transnational project to monitor desertification processes and related natural resources in arid and semi-arid areas of South America /

El margen continental argentino : entre los 35º y 55º de latitud Sur en el contexto del artículo 76 de la Convención de las Naciones Unidas sobre el Derecho del Mar = The Argentine continental margin : between 35º and 55º South latitude in the Context of Article 76 of the United Nations Convention on the Law of the Sea /

Detección y control de la desertificación : conferencias, trabajos y resultados del Curso Latinoamericano, Mendoza, Argentina /

Maps Yellowstone and Grand Teton National Parks /

Grand Teton /

Yellowstone : National Park, Wyoming-Montana-Idaho /

Zion National Park /

Yellowstone : the Flowering of an idea /

Bryce Canyon National Park-Utah /

Channel Islands /

Biodiversity prospecting : using genetic resources for sustainable development /

Energy as a tool for sustainable development : for African, Caribbean and Pacific countries / by Farinelli, Ugo

Estado de conservación de la fauna silvestre del Cono Sur Sudamericano / by Iriarte Walton, Agustín

Panoramic view of the crater Lake National Park, Oregon / by Renshawe, John H.

ECOLOGICAL ENTOMOLOGY

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