http://www.treccani.it/enciclopedia/thaon-di-revel-paolo/ https://books.google.co.uk/books?id=1ZZ_AgAAQBAJ&pg=PA306&dq=Paolo+Thaon+di+Revel+ammiraglio&hl=en&sa=X&ved=0ahUKEwjt3JSp58bOAhVLLsAKHRpABCAQ6AEIIzAC#v=onepage&q=Paolo%20Thaon%20di%20Revel%20ammiraglio&f=false
