Eenige bedrijfseconomische beschouwingen over de poetsmiddelenindustrie in Nederland. II 1939, (Ikke digitaliseret)
Wavelength tables with intensities in arc, spark, or discharge tube of more than 100. 1939, (Ikke digitaliseret)
Manual of procedure in beach erosion studies. Washington , U. S. gvmt .prtg.off. , 1939. 1939, (Ikke digitaliseret)
Vandteknikeren. Udg.af Vandværksi ~ styrernes tekniske Forening i Danmark. 1939, (Ikke digitaliseret)
Audels new automobile guide for mechanics, operators and servicemen. By F.D.Graham. 1939, (Ikke digitaliseret)
Reinforced concrete design handbook of the American Concrete Institute. Detroit,1939. 1939, (Ikke digitaliseret)
Rest-pauses and refreshments in industry. London,National Institute of Industrial Psychology,1939. 1939, Ramsay, J.; Rawson, R.E., (Ikke digitaliseret)