1989 Airmail – The 100th Anniversary of the Birth of Laureano Gomez, 1889-1965
1989 Airmail – The 100th Anniversary of the Birth of Laureano Gomez, 1889-1965
South America
1989 Airmail – The 100th Anniversary of the Birth of Agustin Nieto Caballero, 1889-1975
1989 Airmail – The 100th Anniversary of the Birth of Agustin Nieto Caballero, 1889-1975
1988 Airmail – Nature Conservation WM: 7
1988 Airmail – Nature Conservation WM: 7
1988 Airmail – Pre-Columbian Art Treasures
1988 Airmail – Pre-Columbian Art Treasures
1988 Airmail – Zipa Tisquesusa, 16th-century Indian Chief
1988 Airmail – Zipa Tisquesusa, 16th-century Indian Chief