Changes

* [http://www.amazon.com/gp/product/B016AY7T76?colid=2U7JPR40PC5G2&coliid=I30J7IAENBH9DZ Amazon source for NaOH.]

* [https://www.facebook.com/groups/MilkTheFunk/permalink/1211858545509024/ MTF discussion regarding Kara Taylor's BA presentation that shows TA for multiple beers, and suggestion for using "Sour Units" as a measurement for beer.]

* [https://www.facebook.com/groups/MilkTheFunk/permalink/1228704607157751/?comment_id=1228977910463754&reply_comment_id=1228997810461764&comment_tracking=%7B%22tn%22%3A%22R7%22%7D MTF tips on safety and methods of measuring TA from a research technician.]

* [https://www.beeradvocate.com/mag/14649/savoring-acidity-the-quest-to-explain-sourness-in-beer/?mc_cid=16534dd7fd&mc_eid=243e286e71 "Savoring Acidity: The Quest to Explain Sourness in Beer", by Brian Yaeger in BeerAdvocate magazine.]