1. Bloss, F.D. (1999) Optical Crystallography, Mineralogical Society of America: Chantilly, VA, 239 pp;
2. http://www.minsocam.org/msa/Monographs/
3. #Optical.
4. Bloss, F.D. (1981) The Spindle Stage: Principles and Practice, First Edition, Cambridge University Press, 356 pp.
5. Cargille Laboratories. Refractive Index Liquids, Cedar Grove, NJ; https://www.cargille.com/refractive-index-liquids.