Club of Rome circulars from Aurelio Peccei
Correspondence between Aurelio Peccei and Elisabeth Mann Borgese
Aurelio Peccei's circular letters to CoR members
Circular letters to CoR members from Aurelio Peccei
Correspondence To Elisabeth Borgese from Alexander King, Chairman for the Federation of International Institutes for Advanced Study
Correspondence to Aurelio Peccei and the Executive Committee
Correspondence between Aurelio Peccei and Elisabeth Borgese regarding CoR meetings