STERNBERG (F.) : Der Imperialismus. Berlin-Malik-Verlag, 1926, -JENKS (L. H.): The migration of British capital to 1875. Nueva York-Londres, A. A. Knopf, 1927.- DUNN (R.W.): American Foreign investments. Contract and concessions Edited by A. Richt. Nueva York. R.W. Avesloch and the Viking Press; 1926. 1 C::, s., 1 ~)..;... ).