Europe

1981 The 11th International Congress on Clinical Chemistry

1981 The 850th Anniversary of the City of St. Veit on Glan

1981 The 25th Anniversary of Seibersdorf Research Centre

1981 Children’s Stamp

1981 The 100th Anniversary of Austrian Telephony

1981 EUROPA Stamps – Folklore

1981 Kuenring Exhibition at Zwettl Abbey

1981 UNICHAL Congress – Vienna 1981

1981 The 125th Anniversary of Sigmund Freud

1981 The 3rd European Regional Conference – Rehabilitation International