Columbia subject headings:
Harvard subject headings:
Panama Canal (Panama)--History.
Panama Railroad Co.--History.
Panama--Emigration and immigration--History.
Panama--Emigration and immigration.
West Indians--Panama--History.
West Indians--Panama.
West Indies, British--Emigration and immigration--History.
West Indies--Emigration and immigration.
Princeton subject headings:
Panama Canal (Panama)--Design and construction--History.
Panama Railroad--Design and construction--History.
Panama--Emigration and immigration--History.
West Indies, British--Emigration and immigration--History.
West Indies--Panama--History.