by Louis De Vries...[et al.] by Louis De Vries by Louis De Vrirs by Louis De Vries, Theo M. Herrmann by Berrl T. Atkins...[et al.] by Finis S. Patton...[et al.] by Harry H. Weiser...[et al.] Louis De Vries by Alois Hass...[et al.] by James C. S. Lu...[et al.]