Bertha Phillpotts, Frederick Beck, James Sime, W. Alison Phillips, James Headlam and Arthur William Holland, 1911 Encyclopædia Britannica (1911)
“ Even in the earlier stages of its development the Zollverein had a marked effect on the condition of the country. Its growth coincided with the introduction of railways, and enabled the nation to derive from them the full benefit; so that, in spite of the confusion of political powers, material prosperity increased, together with the consciousness of national unity and a tendency to look to Berlin rather than to Vienna as the centre of this unity. ”
