Literature about the rainbow

1. The Nature of Light & Colour in the open air by M. Minnaert, Dover. (362 pages)
2. Regnbåge och gloria i optik och atomfysik, av Nanny Fröman, Elementa 2 (Sweden), 1987 page 55-70
3. Nattens Iris av Clas-Olof Selenius, same Elementa page 71-72
4. The Amateur Scientist, Scientific American July 1977, page 138 - 144: How to create and observe a dozen rainbows in a single drop of water by Jearl Walker.
5. Scientific American, April 1977 page 116 - 127. (The best source!)