"Big Soviet Encyclopedia (U)" is a publication consisting of several volumes, covering a wide range of topics from various fields of knowledge. At its core, this encyclopedia is an important source of information about history, culture, science, technology, art, and much more. The publication contains many articles, illustrations, tables and diagrams that reveal the essence of various concepts and phenomena. The encyclopedia has become an important source of knowledge for readers of any age, as it contains information for every taste and question. This publication is relevant for various professional fields of activity and for a wide range of readers who are interested in learning about the world around them. Anyone who opens the pages of this book gets the opportunity to deepen their knowledge and expand their horizons."