Tracking Operations Questions and Answers a 2 kN. Kn. 1 General Provisions teaching practical manual. In 1-x Prince Book 1 (Vol 3) / Operativno-rozysknaya deyatelnost voprosy i otvety v 2 kn. Kn. 1 Obshchie polozheniya uchebno-prakticheskoe posobie. V 1-kh kn Kn 1(izd 3)