1976 Airmail – The 100th Anniversary of the Birth of Dr. Hideyo Noguchi, 1878-1928
1976 Airmail – The 100th Anniversary of the Birth of Dr. Hideyo Noguchi, 1878-1928
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1976 Airmail – The 100th Anniversary of the Birth of Dr. Hideyo Noguchi, Bacteriologist, 1878-1928
1976 Airmail – The 100th Anniversary of the Birth of Dr. Hideyo Noguchi, Bacteriologist, 1878-1928
1976 Airmail – The 200th Anniversary of American Revolution
1976 Airmail – The 200th Anniversary of American Revolution
1976 Airmail – The 10th Inter-American Construction Industry Congress, Quito
1976 Airmail – The 10th Inter-American Construction Industry Congress, Quito
1976 Airmail – The 10th Inter-American Construction Industry Congress, Quito
1976 Airmail – The 10th Inter-American Construction Industry Congress, Quito
1976 Airmail – The 3rd Pan-American Ministers’ Conference on Transport Infrastructure, Quito
1976 Airmail – The 3rd Pan-American Ministers’ Conference on Transport Infrastructure, Quito
1976 Airmail – The 3rd Pan-American Ministers’ Conference on Transport Infrastructure, Quito
1976 Airmail – The 3rd Pan-American Ministers’ Conference on Transport Infrastructure, Quito
1976 Airmail – The 441st Anniversary of Guayaquil
1976 Airmail – The 441st Anniversary of Guayaquil
1976 Airmail – The 50th Anniversary of Bolivarian Society
1976 Airmail – The 50th Anniversary of Bolivarian Society
1976 Airmail – Post Office Building Project
1976 Airmail – Post Office Building Project