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- United States Earthquakes, 1938
- Report discussing earthquake activity in the United States during 1938. The report is broken down by regions and has sections for specific earthquakes. digital.library.unt.edu/ark:/67531/metadc40331/
- United States Earthquakes, 1937
- Report discussing earthquake activity in the United States during 1937. The report is broken down by regions and has sections for specific earthquakes. digital.library.unt.edu/ark:/67531/metadc40330/