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Wherever you look you can find a standard!
Thanks to standards, books are unique. This is guaranteed by the so-called ISBN number, an internationally unified coding system making each work identifiable.

How standards can be modified or amended?


Bulgarian Institute for Standardization revises periodically the actuality of Bulgarian standards in order to ensure they reflect the achieved up-to-date level of science and technologies. 

The amendment, revision or withdrawal of Bulgarian standards or other Bulgarian standardization documents is performed in compliance with the rules for national standardization work.

27 Apr 2006