(1973), “World Plan Council of the Socialist International: Separate and joint meetings of the Study Groups on Development and on the Environment, June 27-28, 1973”, Fundação Mário Soares e Maria Barroso / Mário Soares, Disponível em: https://casacomum.org/visualizador?cota=02497.049.001 (consultado em 2026-08-18)

World Plan Council of the Socialist International: Separate and joint meetings of the Study Groups on Development and on the Environment, June 27-28, 1973. Fundação Mário Soares e Maria Barroso, Mário Soares, 1973. Cota: 02497.049.001. [Consult. 18 ago. 2026]. Disponível em: https://casacomum.org/visualizador?cota=02497.049.001

(1973). World Plan Council of the Socialist International: Separate and joint meetings of the Study Groups on Development and on the Environment, June 27-28, 1973. Fundação Mário Soares e Maria Barroso, Mário Soares. https://casacomum.org/visualizador?cota=02497.049.001

“World Plan Council of the Socialist International: Separate and joint meetings of the Study Groups on Development and on the Environment, June 27-28, 1973,” 1973, Mário Soares, Fundação Mário Soares e Maria Barroso. https://casacomum.org/visualizador?cota=02497.049.001.