All links of Just Intonation

The Chrysalis FoundationThe Chrysalis Foundation
Pythagorean Tuning and Medieval PolyphonyPythagorean Tuning and Medieval Polyphony
Just Intonation ExplainedJust Intonation Explained
Musical TemperamentMusical Temperament
Tuning by RatiosTuning by Ratios

Just Intonation related site: