It is hard to state concrete numbers for the Bulgarian collection. It includes around 37,000 volumes and grows by around 350 monographs annually. In addition, there are over 1,100 current and discontinued periodicals. The major part of the collection still consists of printed materials. However, the proportion of electronic journals has increased slightly during the past two decades. Most of the historical Bulgarian holdings are available digitally in the open-access format using the library catalogue.

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