Columbia subject headings:
Chicherin, B. N. (Boris Nikolaevich), 1828-1904.
Koshelev, Aleksandr Ivanovich, 1806-1883.
Russia (Federation)--History--19th century--Sources.
Harvard subject headings:
Chicherin, B. N. (Boris Nikolaevich), 1828-1904.
Koshelev, A. I. (Aleksandr Ivanovich)
Russia--History--1801-1917--Sources.
Princeton subject headings:
Chicherin, B. N. (Boris Nikolaevich), 1828-1904.
Koshelev, Aleksandr Ivanovich, 1806-1883.
Russian (Federation)--History--19th century--Sources.