original article on Richter scale, published January 1935
scholarly article published in 1942
revision of 1942 paper
scientific article
book
scientific article published in Nature
scientific article
scientific article published in 1956
scientific article published in 1948
scientific article
Washington, D.C. :[U.S. G.P.O.],1931. | University of Florida, George A. Smathers Libraries
scientific article published in 1969
scientific article published in 1965
scientific article published in 1959
scholarly article
written work by by B. Gutenberg and C. F. Richter
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