Huz A.M (2023) “MAIN STAGES OF ESTABLISHMENT OF THE SYSTEM OF PROTECTION OF STATE SECRETS IN POLAND IN THE SECOND HALF OF THE 20th CENTURY – IN THE FIRST HALF OF THE 21st CENTURY: HISTORICAL AND LEGAL ANALYSIS”, Elementary Education Online, 20(5), pp. 4223–4228. Available at: https://ilkogretim-online.org/index.php/pub/article/view/6079 (Accessed: 5 January 2025).