Original standard ISO 1391-2-1976 (1977) in PDF full version. Additional info + preview on request
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Original standard ISO 1391-3-1976 (1977) in PDF full version. Additional info + preview on request
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Original standard ISO 1391-4-1976 (1977) in PDF full version. Additional info + preview on request
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Original standard ISO 1391-5-1981 in PDF full version. Additional info + preview on request
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Original standard ISO 13910-2014 in PDF full version. Additional info + preview on request
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Original standard ISO 13912-2017 in PDF full version. Additional info + preview on request
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