The Pliocene floras of the Dutch-Prussian border
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書誌事項
The Pliocene floras of the Dutch-Prussian border
（Mededeelingen van de Rijksopsporing van Delfstoffen = Mitteilungen der staatlichen Bohrverwaltung in den Niederlanden = Mémoires du service des explorations minières de l'État des Pays-Bas = Memoirs of the government institute for the geological exploration of the Netherlands, No. 6）
Institute for the Geological Exploration of the Netherlands, 1915