SA:~Van Heukelom listed as J.B. van Heukelom. Sijmons listed as H.H. Symons. Boeken, Dudok, Dwars, Joling, Kramer, Kromhout,Van Loghem, Van der Pek, Rutgers listed without capital letter(s). Blaauw listed without capital letter(s); it cannot be determined which Blaauw it refers to. ~Also listed: J. Melan, as: "1909 [...] the Zijpendaal gate in Arnhem. The design of Prof. J. Melan, connected with the Wittenburg factory is carried out [...]".~~BU:~J. & Jan Baanders listed as "the architectural firm of Herman and Jan Baanders".~~IL:~photographs, reproductions/illustrated/radio station Malabar near Bandoeng on Java (v.m. NOI); reproductions/illustrations from literature used; reproduction/radio station at Nauen (Dld); photo/earmark of radio station Kootwijk; photo construction phase, exterior photo, floor plan/teahouse for unmarried civil servants at radio station at Kootwijk; exterior photo, floor plan/worker's houses at radio station at Kootwijk; architectural drawings/projects, arch. Luthmann; perspective drawing exterior/government buildings, arch. Zietsma; exterior photo/transformer house at radio station at Kootwijk; exterior photo, cross-sections, floor plans/water tower at radio station at Kootwijk; ~exterior photos, interior photos, reproductions, photos of construction phases/radio station at Kootwijk, arch. Luthmann