Erhard, Ludwig, author
Germany's comeback in the world market
George Allen and Unwin, 1954
 Buku Teks
Adelman, M.A., author
The world petroleum market
Johns Hopkins University Press, 1972
 Buku Teks
Fischer, Fritz, author
Germany's aims in the First World War / Fritz Fischer
W.W. Norton & Company, 1967
 Buku Teks
Heijbroek, A.M.A., author
The world seed market : developments and strategies
Rabobank International Group , 1996
 Buku Teks
The Federal Republic of Germany: partner of the world; documentation of economy and export
German : Verlag furwirtschaftliche Information
 Majalah, Jurnal, Buletin
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