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Gunn, John

Guidelines for geoconservation in protected and conserved areas (Arabic version)

Guidelines for cave and karst protection : second edition

Richtlinien zum Schutz des Geo-Naturerbes in Schutz- und Erhaltunggebieten

Diretrizes para a geoconservação em áreas protegidas

Lignes directrices pour la géoconservation dans les aires protégées et conservées

Guidelines for geoconservation in protected and conserved areas

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