CZECHOSLOVAKIA
1976 Airmail - PRAGA 78 International Stamp Exhibition, Prague Architecture
Czechoslovakia 1974 - BRNO 74 National Stamp Exhibition
1980 The 50th International Peace Marathon, Kosice
1987 Stamp Day - The 105th Anniversary of the Birth of Jakub Obrovsky ,Stamp Designer
1977 The 25th Anniversary of Police Aides Corps
The 30th Anniversary of Young Pioneer Organization and International Year of the Child
1987 The 11th Biennial Exhibition of Book Illustrations for Children, Bratislava
Czechoslovakia 1977 - The 9th Trade Unions Congress
1988 Praga '88 International Stamp Exhibition - Present-day Prague
1977 The 6th Biennial Exhibition of Children's Book Illustrators, Bratislava
1987 The 30th Anniversary of Organization of Socialist Countries' Postal Administrations
1989 The 12th Biennial Exhibition of Book Illustrations for Children