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Agenda 21 : programme of action for sustainable development : Rio declaration on environment and development Monografia Publication New York : United Nations, 1992 Description 294 p. : il. ; 28 cm LocationBiblioteca da UMinho no Campus de Azurém, Biblioteca Geral da Universidade do Minho Availability Available (2).

Agenda 21 for the travel &=and tourism industry : towards environmentally sustainable development / United Nations Conference on Environment and Development Monografia Publication S.l. : World Tourism Organization, 1996 Description 78 p. : il. ; 30 cm LocationBiblioteca da UMinho no Campus de Azurém Availability Available (1).