Why, and How, Should Geologists Use Compositional Data Analysis
This is a free, online wikibook, so its contents are continually being updated and refined. According to the authors, "It is important for geochemists and geologists in general to be aware that the usual multivariate statistical techniques are not applicable to constrained data. It is also important for us to have access to appropriate techniques as they become available. This is the principal aim of this book."