1. Kryvokon A. TRACTOR BUILDING IN UKRAINE: BACKGROUND, HISTORY AND DEVELOPMENT TRENDS IN THE ASPECT OF WORLD PROGRESS (1920s‒1980s) / editor . — Kharkiv: TECHNOLOGY CENTER PC, 2015. — ISBN: 978-966-97466-9-6. — DOI: 10.15587/978-966-97466-9-6.