Columbia subject headings:
Dufour, Guillaume Henri, 1787-1875--Correspondence.
Engineers--Switzerland--Correspondence.
Generals--Switzerland--Correspondence.
Pictet, Adolphe--Correspondence.
Switzerland--Politics and government--1815-
Harvard subject headings:
Dufour, Guillaume-Henri, 1787-1875--Correspondence.
Engineers--Switzerland--Correspondence.
Generals--Switzerland--Correspondence.
Pictet, Adolphe--Correspondence.
Switzerland--Politics and government--1815-
Princeton subject headings:
Dufour, Guillaume Henri, 1787-1875--Correspondence.
Pictet, Marc-Auguste, 1752-1825--Correspondence.
Switzerland--Politics and government--1815---Correspondence.