@misc{indiciaeb36f95e20a47, title = {Preliminary determination of epicenters, monthly listing: April - June, 1988}, author = {National Earthquake Information Center}, year = {1989}, doi = {10.3133/ofr88600b}, url = {https://pubs.usgs.gov/publication/ofr88600B}, note = {Source identifier: ofr88600B} }