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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.

Control board


Branimir Sandalski - Chairman
Federation of the Scientific Engineering Unions and Technical University of Sofia


Verginia Yoncheva
Ministry of Finance


Prof. Georgi Kjuchukov
University of Forestry

13 Jun 2016