Tracking Operations Questions and Answers a 2 kN. Kn.2 operational-search measures and actions teaching practical manual. In 1-x Prince Book 2 (Vol 3) / Operativno-rozysknaya deyatelnost voprosy i otvety v 2 kn. Kn.2 Operativno-rozysknye meropriyatiya i mery uchebno-prakticheskoe posobie. V 1-kh kn Kn 2(izd 3)