1992 Earth Summit
1986 Agriculture
1992 Mission to Planet Earth
1994 Population and Development
2018 United Nations Vienna Year Set
1984 Future for Refugees
1985 United Nations 40th Anniversary
1986 Stamp Collecting
1986 WFUNA 40th Anniversary, S/S
1987 Fight Drug Abuse
1987 United Nations Day
1988 Survival of the Forests (Co
1990 United Nations 45th Anniversary,S/S
1990 Crime Prevention
1990 Human Rights
1991 Economic Commission for Europe
1992 Science and Technology
1992 International Center
1993 13s Healthy Environment
1993 International Peace Day
1993 Environment Climate Change
1994 International Year of the Family
1994 12s Protection for Refugees
1994 50g,4s&30s Protection for Refugees