March 1981, page 9—Inadvertently a number of editorial changes failed to appear in the Guest Comment “Physics used and unused” by Lewis M. Branscomb. Fully corrected reprints are available from PHYSICS TODAY or from L. M. Branscomb, IBM Corp., Armonk, New York 19504.
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© 1981 American Institute of Physics.
1981
American Institute of Physics
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