# Who invented the term “Coulomb logarithm”?

Who is the author of the term "Coulomb logarithm"? In fact, Coulomb logarithm was computed by Langmuir in his paper of 1928 where the term "plasma" was introduced into physics, but the term "Coulomb logarithm" seemed to appear later. The earliest reference I found is the paper Relativistic kinetic equation by Belyaev & Budker (1956).

UPDATE: Using Google Labs I found a reference dated by 1937 in very rare Georgian journal in Russian.

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