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Ogawa Forest Reserve - Japan |
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Ooyamazawa Riparian Forest Research Site - Japan |
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Ordesa y Monte Perdido / Huesca ES - Spain |
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Otsuchi Bay - Japan |
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OZCAR-RI Draix-Bleone observatory - France |
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PermaFrance Deux Alpes - France |
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Postojna-Planina Cave System - Slovenia |
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Rajec-Nemcice - Czechia |
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Ramon (RMN) - Israel |
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Research monitoring station "Petrodolinskoye" - Ukraine |