@inbook{220,
  author = {John Erickson},
  editor = {Keith Sword},
  title = {The Red Army’s March into Poland, September 1939},
  year = {1991},
  journal = {The Soviet Takeover of the Polish Eastern Provinces, 1939-41},
  publisher = {St. Martin's Press},
  address = {New York},
  language = {English},
}