http：//www.trumanlibrary.org/whistlestop/study_collections/doctrine/large/documents/index.php?documentdate=1947-03-12；documentid=5-9；pagenumber=1；http：//avalon.law.yale.edu/20th_century/trudoc.asp. vpPhQK6HfvuUHZ4WuR2NSlFV93dnc3S04JRMPc8+aE9uVuxbIEvFqv9FH8/6pZ24
