Doble vidre aïllant (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Doble vidre aïllant" in Catalan language version.

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1,932nd place

espacenet.com

v3.espacenet.com

  • Stetson, Thomas D., "Improvement in Window Glass", US patent 49167, emesa 1865-08-12

google.cat

books.google.cat

greenbuildingadvisor.com