The "Great Soviet Encyclopedia" is a large reference book on various fields of knowledge, published in 65 volumes between 1926 and 1947. This encyclopedia is one of the most valuable sources of information about history, culture, science and technology in the USSR. Its pages contain a huge amount of knowledge and facts that testify to the wide development of culture and scientific research in the Soviet Union. The "Great Soviet Encyclopedia" still remains an important source of information for scientists, historians and anyone interested in the past and present.