| Northern Europe | Denmark, Finland, Great Britain, Ireland, Norway, Sweden |
| Middle Europe | Austria, Belgium, Czechoslovakia, Germany, Hungary, Netherlands, Poland, Switzerland |
| Southwestern Europe | France, Spain |
| Southeastern Europe | Albania, Bulgaria, Greece, Italy, Romania, Turkey-in-Europe, Yugoslavia |
| Eastern Europe | Belarus, Baltic States, Central European Russia, East European Russia, North European Russia, South European Russia, Northwest European Russia, Ukraine |
| Siberia | West Siberia |
| Caucasus | North Caucasus, Transcaucasus |
| Northeastern U.S.A. | Vermont |