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. hdzSNW0LW33e63U54Vy0cua1gWLN5VgN3JR9H1X+jaCDpnvBVe+4TIJ9tRwFTbLd
