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Tourism and related services. Sustainability management system for accommodation establishments. Requirements. Original standard BS ISO 21401-2018 + A1-2024 in PDF full version. Additional info + preview on request

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Tourism and related services. Yacht harbours. Essential requirements for luxury harbours. Original standard BS ISO 21406-2020 in PDF full version. Additional info + preview on request

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Manual methods for the measurement of a groundwater level in a well. Original standard BS ISO 21413-2005 in PDF full version. Additional info + preview on request

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Milk, milk products, infant formula and adult nutritionals. Determination of chloride. Potentiometric titration method. Original standard BS ISO 21422-2018 (2021) in PDF full version. Additional info + preview on request

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Tourism and related services. Medical spas. Service requirements. Original standard BS ISO 21426-2018 in PDF full version. Additional info + preview on request

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Water quality. Evaluation of the genotoxicity by measurement of the induction of micronuclei. Evaluation of genotoxicity using amphibian larvae. Original standard BS ISO 21427-1-2006 (BS 6068-5.44-2006) in PDF full version. Additional info + preview on request

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