Columbia subject headings:
Philosophers--France--Correspondence.
Social scientists--France--Correspondence.
Voyer, Jean-Pierre--Correspondence.
Harvard subject headings:
Philosophers--France--Correspondence
Social scientists--France--Correspondence.
Voyer, Jean-Pierre--Correspondence.
Princeton subject headings:
Philosophers--France--Correspondence.
Sociologists--France--Correspondence.
Voyer, Jean-Pierre--Correspondence.