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→External Resources
===External Resources===
* [http://aabg.org/wp-content/uploads/2010/01/Walloon-solera-ale-in-Sweden.pdf Old Walloon Ale; a 200 year old solera.]
* [https://archive.org/details/SoleraAgingSpreadsheet Michael Tonsmeire's Solara Aging CalculatorSpreadsheet.]
==References==