John Ledyard's journey through Russia and Siberia, 1787-1788

Ledyard, John 1751-1789. John Ledyard's journey through Russia and Siberia, 1787-1788: the journal and selected letters / edited with an introduction by Stephen D. Watrous . - Madison : Milwaukee : London : University of Wisconsin Press, 1966 . - xiv, 293 p. 22 cm.
К.: Бібліогр. : c. 265-279, Index