@misc{indiciae9d635e7f5e72, title = {Proceedings of Conference XL; a workshop on The U.S. Geological Survey's role in hazards warnings}, author = {W. W. Hays}, year = {1987}, doi = {10.3133/ofr87269}, url = {https://pubs.usgs.gov/publication/ofr87269}, note = {Source identifier: ofr87269} }