1993 Football World Cup – U.S.A. (1994)
1993 Football World Cup – U.S.A. (1994)
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1993 The 100th Anniversary of the Birth of Hermann Oberth
1993 The 100th Anniversary of the Birth of Hermann Oberth
1993 Winter Olympic Games – Lillehammer ’94, Norway
1993 Winter Olympic Games – Lillehammer ’94, Norway
1993 The 90th Anniversary of the Pan-American Health Organization – Anti-AIDS Campaign, 1992
1993 The 90th Anniversary of the Pan-American Health Organization – Anti-AIDS Campaign, 1992
1993 America UPAEP – Endangered Animals
1993 America UPAEP – Endangered Animals
1987 “Exfivia 87” Stamp Exhibition, Potosi
1987 “Exfivia 87” Stamp Exhibition, Potosi
1987 “Espamer ’87” Stamp Exhibition, La Coruna
1987 “Espamer ’87” Stamp Exhibition, La Coruna