Solar cells proceedings of the international colloquium organized by the European Cooperation Space Environment Committee (ECOSEC) from July 6 to 10, 1970, in Toulouse, France with the collaboration of the Centre National d'Etudes Spatiales (CNES) and of the Departement d'Etudes et de Recherches en Technologie Spatiale (DERTS) of the Centre d'Etudes et de Recherches, Toulouse = Cellules solaires (Gordon & Breach, 1971)