Before revision: In German In English In the English speaking world, the term "clarke" was not even used in Wells(1937) which introduced Fersman's proposal, nor in later USGS articles such as Fleischer(1953).
After revision: In English In the English speaking world, the term "clarke" was not even used in Wells(1937) which introduced Fersman's proposal, nor in later USGS articles such as Fleischer(1953).