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EVS-EN ISO 5667-6:2016/A11:2020 Vee kvaliteet : proovivõtt. Osa 6, Juhised jõgedest ja muudest vooluveekogudest proovide võtmiseks = Water quality : sampling. Part 6, Guidance on sampling of rivers and streams (ISO 5667-6:2014)
Health in the Baltic countries ; 2006Tervise Arengu Instituut, Eesti Meditsiinistatistika Büroo, Eesti. Sotsiaalministeerium.Statistika- ja analüüsi osakond, Centre for Disease Prevention and Control of Latvia, Lithuanian Health Information Centre