- American Homebrewers Association
- MnBeer.com
- Midwest Supplies
- Northern Brewer
- WindRiver Brewing Company
- Basic Brewing Radio
- yellowdogbrewery.com
- www.howtobrew.com
- www.primetab.com/yeaststarter
- www.brewheads.com/calc
- hbd.org/brewery/library/yeast-faq
- The Beer Mapping Project
- The Four Firkins