Columbia subject headings:
Scotland--Emigration and immigration--Congresses.
Scotland--Social conditions--Congresses.
Harvard subject headings:
Civilization, Modern--Scottish influences--Congresses.
Scotland--Emigration and immigration--History--Congresses.
Scotland--Social conditions--Congresses.
Scots--Foreign countries--History--Congresses.
Princeton subject headings:
Scotland--Emigration and immigration--History--Congresses.
Scotland--Social conditions--Congresses.
Scots--Foreign countries--History--Congresses.