Ontwerpjaren: 1920;1924;1925;1927 Illustrations: perspective drawing/Hofplein Rotterdam (design A. Staal, H.A. Maaskant, W. van Tijen); 2 perspective drawings, floor plan/Börsenhof Königsberg Germany (design M.A. Stam); floor plans and facade/design residential house, Thun, Switzerland; floor plans/Gymnasium, Thun, Switzerland; 3 facade designs, 2 sections, 2 perspective drawings and 2 floor plans/Office complex Am Knie Berlin Germany; 4 perspective drawings, floor plan/Cloud skyscraper Moscow Russia; floor plans/townhouse, Ommen; reproduction/facades and floor plan, design office building 'Am Knie', Königsberg, Germany; situation sketch, floor plan/Extension plan Trutnov Czech Republic; perspective drawing and floor plan/Gymnasium St. Wendel Germany; reproduction/design drawing facade and perspective, Cornavin station, Geneva; reproduction/design for the extension of Rotterdam; 2 floor plans, 2 perspective drawings/Gymnasium Thun Switzerland; perspective drawing, 2 floor plans/Dwelling house with extension possibilities 1923; reproduction/design for a dwelling house with extension possibilities, from M. v. de Rohe, 'Modernes Bauen', ABC, no. 3-4, 1925; reproduction/perspective and facade design, gymnasium, Thun, Switzerland; 2 perspective drawings, cross-section, skeleton drawing/Dwelling house with extension possibilities 1924; situation sketch, floor plan,perspective drawing/Station Cornavin Geneva Switzerland (design M.A. Stam); reproduction/perspective and floor plan, design gymnasium in St. Wendel, Germany; reproduction/perspective drawing, Van Nelle factory, Rotterdam; perspective drawing/Station Cornavin Geneva Switzerland (design M.A. Stam and A. Itten); perspective drawing, 2 facade drawings first design/Van Nelle Factory Rotterdam; reproduction/competition design city extension Trautenau, Czech Republic; reproduction/competition design for the extension of The Hague; perspective drawing/Bank building Mathenesserlaan Rotterdam; 2 exterior photographs/Villa Van der Leeuw Kralingse Plas Rotterdam; reproductions (4)/variant designs for El Lissitsky skyscraper; reproductions/price competition design, shopping gallery with café-restaurant, Laan van Meerdervoort, The Hague; 3 perspective drawings, street profile/Rokin-Dam Amsterdam (design M.A. Stam) reproduction; aerial photograph/situation Hofplein, Rotterdam; situation, floor plan and cross-section/design for Cornavin station, Geneva; situation/skyscrapers at intersections of ring road and radial roads, Moscow; 2 perspective drawings, 4 situation sketch/Autobus station Oostplein Rotterdam; 2 perspective drawings, 5 cross-sections/Water tower Wassenaar (design M.A. Stam); reproduction/design drawing of bank building, Mathenesserlaan, Rotterdam; photo/corner building, Van Nelle, Leiden; perspective drawing, 3 perspective drawings interior, facade drawing, sitiation sketch, 2 floor plans, window/Office building Berkel's Patent De Keileweg Rotterdam; perspective drawing, 4 exterior photos, 2 interior photos, situation plan, 3 floor plans, photo chair/Three houses Weissenhof Stuttgart Germany; photos (2)/façades, residential house, Ommen; floor plans/meeting building of the Theosophists (Cineoltheater), Tolstraat, Amsterdam; photo/Affiche Internationale Architectuur Tentoonstelling Rotterdam; photo/Affiche Mezinárodní nové Architektury Praha; photos (2)/façades villa Aan de Plas, for Kees van der Leeuw, Rotterdam; reproduction/façade designs, terminus Dam and buildings Tokin and Spui, Amsterdam; 2 perspective drawings, 5 exterior photos, situation sketch, 8 interior photos, maquette photo, 3 floor plans, cross section, 7 façade drawings/Budge-Altersheim Frankfurt am Main Germany; aerial photo, situation sketch, 16 exterior photos, 4 floor plans/Living quarter Hellerhof Frankfurt am Main Germany; street profile/Rokin, Amsterdam; reproduction/designs redesign Hofplein, Rotterdam; perspective drawing, 4 exterior photos, 4 interior photos/Dwelling house Palicka Prague Czech Republic; 2 floor plans, overview photo/Magnitogorsk Siberia Russia; aerial photo/situation Hofplein, Rotterdam; reproductions (3)/competition designs for an autobus Rot