Columbia subject headings:
Indians of North America in textbooks.
Racism in textbooks.
Thanksgiving Day in textbooks.
United States--Historiography.
United States--History--Textbooks.
Harvard subject headings:
United States--Historiography.
United States--History--Textbooks.
Princeton subject headings:
Indians of North America in textbooks.
Textbooks.
Thanksgiving Day in textbooks.
United States--Historiography.
United States--History--Textbooks.