Columbia subject headings:
Harvard subject headings:
Merchants--Russia--Correspondence.
Merchants--Russia--History--17th century--Sources.
Merchants--Russia--History--18th century--Sources.
Russia--Commerce--History--17th century--Sources.
Russia--Commerce--History--18th century--Sources.
Shergin, Ivan Andreevich--Correspondence.
Princeton subject headings:
Merchants--Russia--Correspondence.
Merchants--Russia--History--17th century--Sources.
Merchants--Russia--History--18th century--Sources.
Russia--Commerce--History--17th century--Sources.
Russia--Commerce--History--18th century--Sources.
Shergin, Ivan Andreevich--Correspondence.