Changes are advocated in some of the definitions, units and notation current in electron diffraction. The purpose of those changes is to separate descriptions of properties of materials from the experiments intended to measure them, and to exhibit as clearly as possible the relationship between the differing properties of a material accessible in X-ray and electron work.
Dawson, B., Goodman, P., Johnson, A. W. S., Lynch, D. F., & Moodie, A. F. (1974). Some definitions and units in electron diffraction. Acta Crystallographica Section A, 30(2), 297-298. https://doi.org/10.1107/S0567739474000635