1. P. Debye, Dispersion of Rontgen rays, Ann. Phys. 46:809 (1915).
2. P. Debye and P. Scherrer, Atomic structure, Physikalische Zeitschrift 19:474 (1918).
3. W.L. Bragg, R.W. James, and C.H. Bosanquet, The distribution of electrons around the nucleus of the sodium and chlorine atoms, Phil. Mag. 44:433 (1922).
4. R.W. James, “The optical principles of the diffraction of X-rays,” Oxbow Press, Woodbridge, CT (1982).
5. W.H. Bragg, The intensity of X-ray reflection by diamond, Proceedings of the Physical Society of London 33:301 (1921). It is interesting that, as recorded by James (ref. 4), the original observation of the 222 reflection by W.H. Bragg was almost certainly due to multiple scattering later discovered by Renninger.