"Great Soviet Encyclopedia (IV)" is an important publication that was created with the aim of providing readers with complete and reliable information about various aspects of world knowledge. The book consists of numerous articles covering various fields of science, culture, history, technology and many other areas of life. Its scope and depth of knowledge make it an important source of information for both a wide range of readers and scholars. "The Great Soviet Encyclopedia (IV)" is not only a reference book, but also a kind of window into the world of knowledge, which allows you to expand your horizons, renew already acquired knowledge and support intellectual development. This book is a symbol of scientific intellectual activity in the past and an important source for the further expansion of knowledge in the modern world."