ANTONIUK Y, TROFYMOVYCH L. THE USAGE OF THE OPEN SOURCES INFORMATION BY THE SPECIAL UNITS OF THE UKRAINIAN NATIONALIST ORGANIZATIONS IN THE 1920s - 1980s. EEHB [Internet]. 2021Sep.30 [cited 2024Nov.14];(20). Available from: http://eehb.dspu.edu.ua/article/view/240030