Columbia subject headings:
Harvard subject headings:
Battlefields--Flanders.
Battlefields--France, Northern.
Flanders--Description and travel.
Flanders--History.
France, Northern--Description and travel.
France, Northern--History.
Princeton subject headings:
Belgium--Guidebooks.
France--Guidebooks.
Guidebooks.
World War, 1914-1918--Battlefields--Belgium--Guidebooks.
World War, 1914-1918--Battlefields--France--Guidebooks.