By the middle of the XIX century the potential of semiautonomous self-government system of Nakhichevanon-Don with villages. based on the letter of Catherine II. granted in 1779 during the resettlement of Armenians from the Crimea to the Lower Don. was practically exhausted. https://lhqjclnigcquz.nizarblog.com/35080108/desain-lembar-kerja-siswa-pada-pembelajaran-stem-untuk-siswa-sekolah-dasar