Using a Refractometer with BeerSmith Brewing Software | BeerSmith Brewing Blog
Woodland Brewing Research: ABV without OG
Specific Gravity table for beer
How To Calculate How Much Alcohol Is In Your Home-brew Beer – BeerCreation.com
aichose Brix Refractometer with ATC, Dual Scale - Specific Gravity & Brix, Hydrometer in Wine Making and Beer Brewing, Homebrew Kit: Amazon.com: Industrial & Scientific
Triple Scale Alcohol Hydrometer(2 pcs)and Test Jar for Home Brew, Wine – Advanced Mixology