What has the author Ernst Samhaber written?

Ernst Samhaber has written:

'Merchants make history' -- subject(s): Commerce, Traveling sales personnel, History

'Erfindungen' -- subject(s): Technology, Inventions

'Weltgeschichte' -- subject(s): World history

'Knaurs Geschichte der Entdeckungsreisen' -- subject(s): Discoveries in geography, History

'Das Geld' -- subject(s): History, Money, Finance