Columbia subject headings:
Hallaire, Jacques--Correspondence.
Hallaire, Jacques.
Jesuits--Missions--Chad.
Missionaries--Chad--Biography.
Sara (African people)--Missions.
Harvard subject headings:
Hallaire, Jacques
Hallaire, Jacques--Correspondence.
Jesuits--Missions--Chad.
Missionaries--Chad--Biography.
Sara (African people)--Missions.
Princeton subject headings: