Historical records from the 'Office of Participant Training', including those pertaining to the organization of third-country training in Europe (1951-61) still exist, as do US Mission to NATO and European Regional Organizations (USRO) reports of third-country training in Europe (1956-60).
Catatan sejarah dari Office of Participant Training, termasuk yang berkaitan dengan organisasi pelatihan negara ketiga di Eropa (1951-1961) masih ada, seperti halnya US Mission untuk NATO dan European Regional Organizations (USRO) berkenaan dengan laporan pelatihan negara ketiga di Eropa (1956-1960).