@inbook {365, title = {The Red Army{\textquoteright}s March into Poland, September 1939}, booktitle = {The Soviet Takeover of the Polish Eastern Provinces, 1939-41}, year = {1991}, publisher = {St. Martin{\textquoteright}s Press}, organization = {St. Martin{\textquoteright}s Press}, address = {New York}, author = {John Erickson}, editor = {Keith Sword} }