By Hubert Franz   Schäfer Dorothea   in Journal of Institutional and Theoretical Economics JITE

ISSN:0932-4569|158|2|256-275

Mohr Siebeck‎(2002)‎

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By Schäfer Dorothea   Versemann Jens   in Imago Mundi: The International Journal for the History of Cartography

ISSN:0308-5694|57|2|164-184

Routledge Ltd‎(2005)‎

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By Schäfer Dorothea   Werwatz Axel   Zimmermann Volker   in Industry and Innovation

ISSN:1469-8390|11|3|225-248

Routledge Ltd‎(2004)‎

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