The manufacturing industry / by C. J. P. Zaalberg. Commerce and navigation / by E. P. DeMonchy. The housing problem / by H. J. Romeyn. Food supply and agriculture / by F. E. Posthuma. The cost of living, prices, and wages / by H. W. Methorst. - Zaalberg, Cornelis Jacobus Phillipus (1872-1944) (The Netherlands and the World War, 1928)