@book{harris68mathematical,
  address = {New York},
  author = {Harris, Z. S.},
  interhash = {a2f232a3806a54bf3770d35ce62347a5},
  intrahash = {f834ac9131f49062a5f1e362c35c8de8},
  location = {New York},
  publisher = {Wiley},
  title = {Mathematical Structures of Language},
  year = 1968
}