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Baris 40: == Pranala luar == * [http://hos.ou.edu/galleries//03Medieval/Crescenzi/ Online Galleries, History of Science Collections, University of Oklahoma Libraries] {{Webarchive\|url=https://web.archive.org/web/20130514222717/http://hos.ou.edu/galleries/03Medieval/Crescenzi/ \|date=2013-05-14 }} High resolution images of works by Pietro Crescenzi in .jpg and .tiff format. * Bibliography and works on line: http://architectura.cesr.univ-tours.fr/Traite/Auteur/Crescenzi.asp?param=en

Pietro de' Crescenzi: Perbedaan antara revisi