Bradley, E. A., and Bennett, T. J., 1965, Earthquake history of Ohio: Bulletin of the Seismological Society of America, volume 55, no. 4, p. 745-752.
 
Seeber, Leonardo, and Armbruster, J. G., 1991, The NCEER-91 earthquake catalog: Improved intensity based magnitudes and recurrence relations for U. S. earthquakes east of New Madrid: National Center for Earthquake Engineering Research, Technical Report NCEER-91-0021, 92 p.
 
Stover, C. W., and Coffman, J. L., 1993, Seismicity of the United States, 1568-1989 (Revised): U.S. Geological Survey Professional Paper 1527, 418 p.
 

INTERNET EARTHQUAKE CATALOGS

US Geological Survey: http://earthquake.usgs.gov/recenteqsww/Quakes/quakes_all.html
 
NCEER Catalog: http://folkworm.ceri.memphis.edu/catalogs/html/cat_nceer.html
 
Canadian database--Geological Survey of Canada: http://www.seismo.nrcan.gc.ca/nedb/eq_db_e.php
 
UTC/GMT: http://neic.usgs.gov/neis/time/time.html
 
Magnitude: http://earthquake.usgs.gov/bytopic/mag_int.html
 
Glossary of earthquake terms: http://earthquake.usgs.gov/4kids/eqterms.html