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  Sperner theory

  https://archive.today/20130106031754/http://opt.math.uni-rostock.de/engel/sperner.html

  Keine Beschreibung vorhanden.

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  Practical Guide to Polypropylene - Devesh Tripathi - Google Books

  https://books.google.de/books?id=YqE1TTEhhCkC

  Polypropylene is now the third largest consumed plastic material after polyethylene and polyvinyl chloride. This book discusses the advantages and disadvantages of working with polypropylene, offering practical comment on the available types of…

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