@BOOK{NAP10330, title = "Growing Vulnerability of the Public Switched Networks: Implications for National Security Emergency Preparedness", doi = "10.17226/10330", url = "https://nap.nationalacademies.org/catalog/10330/growing-vulnerability-of-the-public-switched-networks-implications-for-national", year = 1989, publisher = "The National Academies Press", address = "Washington, DC" }