@book{francis83frequency,
  author = {Francis, Winthrop Nelson and Kucera, Henry},
  booktitle = 1983,
  interhash = {0c62e7ae7fdcda5c360550ec149b79c6},
  intrahash = {c1fc73284ae676d7b3855bc41b31c567},
  publisher = {Houghton Mifflin},
  title = {Frequency Analysis of English Usage: Lexicon and Grammar},
  year = 1983
}