International Union for Conservation of Nature and Natural Resources & International Development Research Centre. (1997). An approach to assessing progress towar sustainability: Tools and training series for institutions, field teams and collaborating agencies. IUCN : IDRC.
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Cita Chicago (17th ed.)
International Union for Conservation of Nature and Natural Resources i International Development Research Centre. An Approach to Assessing Progress Towar Sustainability: Tools and Training Series for Institutions, Field Teams and Collaborating Agencies. Gland: IUCN : IDRC, 1997.
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Cita MLA (9th ed.)
International Union for Conservation of Nature and Natural Resources i International Development Research Centre. An Approach to Assessing Progress Towar Sustainability: Tools and Training Series for Institutions, Field Teams and Collaborating Agencies. IUCN : IDRC, 1997.
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