Humphreys, R. M., primary, Kemp, S., additional, Savonije, G., additional, van der Hucht, K. A., additional, van der Kruit, P. C., additional, Miley, G., additional, Bumba, V., additional, van Nieuwkoop, J., additional, van Hoolst, T., additional, Cox, A., additional, Rutten, R. J., additional, Kleczek, J., additional, de Jager, Cornelis, additional, Jerzykiewicz, M., additional, Zwaan, C., additional, Poedts, S., additional, Sakai, Jun -Ichi, additional, Pecker, J. -C., additional, Heikkila, W., additional, de Jong, T., additional, Wilson, P. R., additional, Müller, E. A., additional, Hoyng, P., additional, Icke, V., additional, Shore, S. N., additional, Achterberg, A., additional, Lucchin, F., additional, Butcher, H., additional, Ne'eman, Y., additional, Heidmann, J., additional, Belton, M. J. S., additional, de Graauw, Th., additional, Waters, L. B. F. M., additional, Pacini, F., additional, Hultqvist, B., additional, Akasofu, S. -I., additional, Vial, J. -C., additional, Schatzman, E., additional, van der Laan, H., additional, Cole, K. D., additional, Vanbeveren, D., additional, Southwood, D., additional, van der Klis, M., additional, and Katgert, Peter, additional