المؤلفون: Popoff, Alexandra, author.

مصطلحات موضوعية: Police patrol -- Russia -- Surveillance operations -- History -- 19th century., Friendship., Police patrol -- Surveillance operations., History., Records and correspondence.

Subject Person: Tolstoy, Leo, graf, 1828-1910 -- Friends and associates., Tolstoy, Leo, graf, 1828-1910 -- Correspondence., Chertkov, V. G. (Vladimir Grigorʹevich), 1854-1936 -- Friends and associates., Chertkov, V. G. (Vladimir Grigorʹevich), 1854-1936 -- Correspondence., Chertkov, V. G. (Vladimir Grigorʹevich), 1854-1936., Tolstoy, Leo, graf, 1828-1910.

جغرافية الموضوع: Russia.

Time: 1800 - 1899