@misc{indiciae237cc3026106, title = {Earthquake data report, July 1991}, author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey}, year = {1991}, doi = {10.3133/ofr91607b}, url = {https://pubs.usgs.gov/publication/ofr91607B}, note = {Source identifier: ofr91607B} }