"Great Soviet Encyclopedia (H)" is a unique reference book that contains extensive knowledge from the most diverse areas of life. The publication is devoted not only to well-known concepts and phenomena, but also studies in detail lesser-known facts and events. Anyone interested in history, culture, science and technology will find here numerous articles, illustrations and references that will open up a wealth of knowledge to them. This encyclopedia has become a veritable graveyard of information and an indispensable source for those who wish to deepen their worldview and expand their knowledge on any topic.