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Langeveld, M. J., Idenburg, Ph. J., Quattrocchi, Luigi, Völcker, Otto, de Bousingen, R. Durand, Gillett, C. R. E., Trébous, Madeleine, Bohnsack, Fritz, Kirchhoff, Hans, and Lauwerys, J. A. L.

Völcker, Otto, King, E. J., Jarman, T. L., Langeveld, M. J., Henderson, James L., Unesco/BIE, Bohnsack, Fritz, Oberholzer, C. K., Lang, Charles, and Roucek, Joseph S.

Oberholzer, C. K., Koelle, W., Langeveld, M. J., Hans, N., Schulenburg, W., Jeangros, E., Dobinson, C. H., Kirchhoff, Hans, Dellaert, René, Beales, A. C. F., Geyer, G., Völcker, Otto, and Kuenstler, Peter

Clark, R. P., Lilja, Einar, Malmqvist, Eve, Reid, Louis Arnaud, King, Edmund, Downing, John, Fleming, C. M., Clausse, Arnould, de Landsheere, G., Mallinson, Vernon, Nash, Paul, Goto, Tomio, Brimer, M. A., Cohen, Rudolf, Pause, Gerhard, Langeveld, M. J., Vliegenthart, W. E., and Planchard, Emile

Langeveld, M. J.

Holmes, Brian, de Landsheere, G. L., Eaglesham, E., Idenburg, J., McFarland, H. S., McCulloch, R. W., Biggs, J. B., Mori, G., Morino, F., Coulthard, James W., Langeveld, M. J., Pringle, M. L. Kellmer, Brimer, M. A., Gordon, Jesse E., Postlethwaite, T. N., Vliegenthart, W. E., Malmquist, Eve, Nel, B. F., Pause, Gerhard, Graff, Kurt, Gammie, A., and Wendt, Dirk

De Witt, Nicholas, King, Edmund, vanden Bossche, Jean, Passow, A. Harry, Malmquist, Eve, Yates, Alfred, Dahllöf, Urban, Williams, John D., Graham, Conrad, Cohen, Rudolf, Höhn, Elfriede, Sysiharju, Anna -Liisa, Gideonse, Harry D., Smith, D. J. D., Kaneti-Barry, S., Tack, Werner H., and Langeveld, M. J.