Columbia subject headings:
Locke, John, 1632-1704.
Harvard subject headings:
Idea (Philosophy)--History--17th century.
Locke, John, 1632-1704
Locke, John, 1632-1704--Contributions in theory of ideas.
Locke, John, 1632-1704. Essay concerning human understanding.
Princeton subject headings:
Locke, John, 1632-1704.