Columbia subject headings:
Harvard subject headings:
Europe--Research.
Information visualization--Europe.
Research--Europe--Methodology.
Research--Europe--Statistical methods.
Social sciences--Europe--Comparative method.
Social sciences--Research--Europe.
Princeton subject headings:
Europe--Research.
Information visualization--Europe.
Research--Europe--Methodology.
Research--Europe--Statistical methods.
Social sciences--Europe--Comparative method.
Social sciences--Research--Europe.