OSPAAAL (Olivio Martínez), "Day of world solidarity with Mozambique," 1968. Offset poster.

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  OSPAAAL (Olivio Martínez), "La Guinea," 1969. Offset poster, 21.25" × 13.25".
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  OSPAAAL (Olivio Martínez), "Solidaridad con Viet Nam," 1972. Offset poster
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  087 Olívio Martínez "World Day of Solidarity with the People of So-Called Portuguese Guinea & Cape Verde." OSPAAAL $250.00
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  OSPAAAL (Olivio Martínez), "Day of world solidarity with the Cuban Revolution," 1973. Offset poster,
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  OSPAAAL (Olivio Martínez), "Day of world solidarity with the people of Mozambique," 1973. Offset poster, 27" × 19"