https://www.oecd.org/general/themarshallplanspeechatharvarduniversity5june1947.htm

https://www.bundeskanzlerin.de/bkin-de/aktuelles/rede-von-bundeskanzlerin-merkel-bei-der-368-graduationsfeier-der-harvard-university-am-30-mai-2019-in-cambridge-usa-1633384

                                                                                       https://www.youtube.com/watch?v=9ofED6BInFs