Home › Authors › H. Ossenbrink 👤 H. Ossenbrink 2 books Books by H. Ossenbrink Qualification test procedures Qualification test procedures for crystalline silicon photovoltaic modules 1992 The results of the 1984/1985 r The results of the 1984/1985 round-robin calibration of reference solar cells for the Summit Working Group on Technology, Growth and Employment 1986