A.K.K.V. Department of Architecture; Prof. B.A.M. Barendse on; Prof. Dr. W.G. Burgers; p. Constantinus; ir. P. Dijkema; Prof. Dr. H.B. Dorgelo; V. Haesaert; H. Hanzelt; Catholic Building Journal; fr. Hans van der Laan; ir. H. Maclaine Pont; Frits van der Meer; E. Mees- Havelaar; D. Metselaar; Dési Ohmert-Granpré Molière; Phie....?; Jos Ritzen; fr. George Smeets; De Tijd; Tin...? fr. Vincent Truyen; Prof. Dr. J.A. VErvaart; W. Vogelsang; Directorate of the Wieringermeer (North East Polder works); Netherlands Organization for Pure Scientific Research; Municipality of Hooge and Lage Zwaluwe;
n.b.: 19.12 not decipherable