Columbia subject headings:
Harvard subject headings:
Brittany (France)--Genealogy.
Engineers--France--Brittany--Biography.
France--Geneaology.
Longeaux family.
Princeton subject headings:
Brittany (France)--Genealogy.
Engineers--France--Brittany--Biography.
France--Genealogy.
Longeaux family.
Longeaux, Albert de, 1809-1857.
Longeaux, Louise de.