1967
The 100th Anniversary of the Birth of Pena Herrera and the 100th Anniversary of Central University of Ecuador in Quito


[The 100th Anniversary of the Birth of Pena Herrera and the 100th Anniversary of Central University of Ecuador in Quito, type AXZ]


[The 100th Anniversary of the Birth of Pena Herrera and the 100th Anniversary of Central University of Ecuador in Quito, type AYA]


[The 100th Anniversary of the Birth of Pena Herrera and the 100th Anniversary of Central University of Ecuador in Quito, type AYB]

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