Columbia subject headings:
Education, Elementary--France--Somme--History--19th century--Sources.
Education, Elementary--France--Somme--History--20th century--Sources.
Educational tests and measurements--France--Somme--History--19th century--Sources.
Educational tests and measurements--France--Somme--History--20th century--Sources.
Harvard subject headings:
Education, Elementary--France--Somme--History--19th century--Sources.
Education, Elementary--France--Somme--History--20th century--Sources.
Educational tests and measurements--France--Somme--History--19th century--Sources.
Educational tests and measurements--France--Somme--History--20th century--Sources.
Princeton subject headings:
Education, Elementary--France--History.
Somme (France)--History--19th century--Sources.
Somme (France)--History--20th century--Sources.