Columbia subject headings:
Philosophers--France--Biography.
Teilhard de Chardin, Pierre.
Harvard subject headings:
Leroy, Pierre, 1900-1992
Philosophers--France--Correspondence
Teilhard de Chardin, Pierre
Princeton subject headings:
Leroy, Pierre, 1900-1992.
Philosophers--France--Correspondence.
Teilhard de Chardin, Pierre.