1963: Line Intensities and Transition Probabilities. American Institute of Physics Handbook, 2nd edition, Section 7l. McGraw-Hill Book Co., New York.

This article includes a reference to my 1959 paper on multiplet strength (see below) that permits replacement of cumbersome numerical tables by an algebraic expression.

1971: Potentials. McGraw-Hill Encyclopedia of Science and Technology.

1981: Quantum Electrodynamics. Encyclopedia of Physics, R.G. Lerner and G.L. Trigg (eds.). Addison-Wesley Publishing Co., Reading, MA, USA.

1990: Updated 1981 article (with A. Rich). Encyclopedia of Physics, 2nd edition.