Original standard ISO 18639-1-2018 in PDF full version. Additional info + preview on request
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Original standard ISO 18639-3-2018 in PDF full version. Additional info + preview on request
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Original standard ISO 18639-4-2018 in PDF full version. Additional info + preview on request
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Original standard ISO 18639-4-2018 amd1-2023 in PDF full version. Additional info + preview on request
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Original standard ISO 18639-5-2018 in PDF full version. Additional info + preview on request
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Original standard ISO 18639-6-2018 in PDF full version. Additional info + preview on request
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