President's address: yesterday, tomorrow and today.
D000068:Accreditation; D002568:Certification; D004467:Economics; D005544:Forecasting; D049673:History, 20th Century; D007878:Legislation as Topic; D012952:Societies / Q000266:history; D013679:Technology, Radiologic / Q000193:education / Q000266:history; D014481:United States