Columbia subject headings:
Harvard subject headings:
Berthelot, M. (Marcellin), 1827-1907--Correspondence.
Philosophers--France--Correspondence
Renan, Ernest, 1823-1892. Correspondence
Princeton subject headings:
Berthelot, M. (Marcellin), 1827-1907--Correspondence.
Philosophers, French--Correspondence.
Renan, Ernest, 1823-1892.--Correspondence