→External links
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* [http://www.blacet.com/about.html About Blacet Research]
* [https://www.modulargrid.net/f/modules/home Frac] on ModularGrid
* [http://www.elby-designs.com/webtek/panther/euro-frac.pdf EuroSynth – FracRak Comparisons] by Laurie Biddulph, 2015
[[Category:Frac]]
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