Scientific libraries: Formal and material development in 2020

The German Library Statistics (DBS) is the national statistics of the German library system and contains statistical key figures. It includes public libraries, scientific libraries, as well as specialized scientific libraries. More information can be found at [DBS](https://www.bibliotheksstatistik.de/). This dataset contains the following information on academic libraries in Bavaria 2020: Formal development: indexing of the newcomer (number of titles), formal indexing: Development of the newcomer (number of titles), including: Self-catalogues, formal indexing: Retro-catalogue (number of titles), subject index: Verbally indexed titles, subject index: Systematically developed titles Note: Due to the pandemic, the data for the reporting years 2020/2021/2022 are only comparable to a limited extent with those of previous years!德国图书馆统计（German Library Statistics，DBS）是德国图书馆体系的国家级统计资料，收录各类统计关键指标。其涵盖公共图书馆、科学图书馆以及专业科学图书馆。更多信息可查阅[DBS](https://www.bibliotheksstatistik.de/)。 本数据集包含2020年巴伐利亚州学术图书馆的如下信息：正式建设：新入藏文献（馆藏量）编目；正式编目：新入藏文献（馆藏量）发展态势，其中包含自建目录；正式编目：回溯编目（Retro-catalogue）馆藏量；主题索引：词汇索引文献；主题索引：系统化加工文献。 注：受新冠疫情影响，2020/2021/2022这三个报告年度的数据与往年数据的可比性有限！